165523907 has 2 divisors, whose sum is σ = 165523908. Its totient is φ = 165523906.

The previous prime is 165523879. The next prime is 165523913. The reversal of 165523907 is 709325561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165523907 - 2¹⁰ = 165522883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165523937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82761953 + 82761954.

It is an arithmetic number, because the mean of its divisors is an integer number (82761954).

Almost surely, 2^165523907 is an apocalyptic number.

165523907 is a deficient number, since it is larger than the sum of its proper divisors (1).

165523907 is an equidigital number, since it uses as much as digits as its factorization.

165523907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 165523907 is about 12865.6094686571. The cubic root of 165523907 is about 549.0605527308.

The spelling of 165523907 in words is "one hundred sixty-five million, five hundred twenty-three thousand, nine hundred seven".