165950623 has 2 divisors, whose sum is σ = 165950624. Its totient is φ = 165950622.

The previous prime is 165950597. The next prime is 165950689. The reversal of 165950623 is 326059561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165950623 - 2⁵ = 165950591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165050623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82975311 + 82975312.

It is an arithmetic number, because the mean of its divisors is an integer number (82975312).

Almost surely, 2^165950623 is an apocalyptic number.

165950623 is a deficient number, since it is larger than the sum of its proper divisors (1).

165950623 is an equidigital number, since it uses as much as digits as its factorization.

165950623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 165950623 is about 12882.1823849843. The cubic root of 165950623 is about 549.5319687765.

The spelling of 165950623 in words is "one hundred sixty-five million, nine hundred fifty thousand, six hundred twenty-three".