165834649 has 2 divisors, whose sum is σ = 165834650. Its totient is φ = 165834648.

The previous prime is 165834607. The next prime is 165834707. The reversal of 165834649 is 946438561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139240000 + 26594649 = 11800^2 + 5157^2 .

It is a cyclic number.

It is not a de Polignac number, because 165834649 - 2⁷ = 165834521 is a prime.

It is a super-2 number, since 2×165834649² = 55002261617906402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165834599 and 165834608.

It is not a weakly prime, because it can be changed into another prime (165834049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82917324 + 82917325.

It is an arithmetic number, because the mean of its divisors is an integer number (82917325).

Almost surely, 2^165834649 is an apocalyptic number.

It is an amenable number.

165834649 is a deficient number, since it is larger than the sum of its proper divisors (1).

165834649 is an equidigital number, since it uses as much as digits as its factorization.

165834649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 165834649 is about 12877.6802647061. The cubic root of 165834649 is about 549.4039261268.

The spelling of 165834649 in words is "one hundred sixty-five million, eight hundred thirty-four thousand, six hundred forty-nine".