165020623 has 2 divisors, whose sum is σ = 165020624. Its totient is φ = 165020622.

The previous prime is 165020617. The next prime is 165020741. The reversal of 165020623 is 326020561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165020623 - 2⁵ = 165020591 is a prime.

It is equal to p_9240055 and since 165020623 and 9240055 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165020923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82510311 + 82510312.

It is an arithmetic number, because the mean of its divisors is an integer number (82510312).

Almost surely, 2^165020623 is an apocalyptic number.

165020623 is a deficient number, since it is larger than the sum of its proper divisors (1).

165020623 is an equidigital number, since it uses as much as digits as its factorization.

165020623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 165020623 is about 12846.0353027695. The cubic root of 165020623 is about 548.5035054358.

The spelling of 165020623 in words is "one hundred sixty-five million, twenty thousand, six hundred twenty-three".