164995969 has 2 divisors, whose sum is σ = 164995970. Its totient is φ = 164995968.

The previous prime is 164995937. The next prime is 164996053. The reversal of 164995969 is 969599461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 46076944 = 10905^2 + 6788^2 .

It is a cyclic number.

It is not a de Polignac number, because 164995969 - 2⁵ = 164995937 is a prime.

It is a super-2 number, since 2×164995969² = 54447339572497922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164995669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82497984 + 82497985.

It is an arithmetic number, because the mean of its divisors is an integer number (82497985).

Almost surely, 2^164995969 is an apocalyptic number.

It is an amenable number.

164995969 is a deficient number, since it is larger than the sum of its proper divisors (1).

164995969 is an equidigital number, since it uses as much as digits as its factorization.

164995969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4723920, while the sum is 58.

The square root of 164995969 is about 12845.0756712446. The cubic root of 164995969 is about 548.4761886907.

The spelling of 164995969 in words is "one hundred sixty-four million, nine hundred ninety-five thousand, nine hundred sixty-nine".