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165994513 is a prime number
BaseRepresentation
bin10011110010011…
…10000000010001
3102120100101122221
421321032000101
5314443311023
624245501041
74053634006
oct1171160021
9376311587
10165994513
1185777153
1247711781
132850c109
141808d8ad
15e88d85d
hex9e4e011

165994513 has 2 divisors, whose sum is σ = 165994514. Its totient is φ = 165994512.

The previous prime is 165994487. The next prime is 165994529. The reversal of 165994513 is 315499561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160579584 + 5414929 = 12672^2 + 2327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-165994513 is a prime.

It is a super-2 number, since 2×1659945132 = 55108356692214338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165994513.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82997256 + 82997257.

It is an arithmetic number, because the mean of its divisors is an integer number (82997257).

Almost surely, 2165994513 is an apocalyptic number.

It is an amenable number.

165994513 is a deficient number, since it is larger than the sum of its proper divisors (1).

165994513 is an equidigital number, since it uses as much as digits as its factorization.

165994513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The square root of 165994513 is about 12883.8857880688. The cubic root of 165994513 is about 549.5804105594.

It can be divided in two parts, 16599 and 4513, that added together give a palindrome (21112).

The spelling of 165994513 in words is "one hundred sixty-five million, nine hundred ninety-four thousand, five hundred thirteen".