165023623 has 2 divisors, whose sum is σ = 165023624. Its totient is φ = 165023622.

The previous prime is 165023591. The next prime is 165023629. The reversal of 165023623 is 326320561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165023623 - 2⁵ = 165023591 is a prime.

It is a super-2 number, since 2×165023623² = 54465592296092258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165023591 and 165023600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165023629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82511811 + 82511812.

It is an arithmetic number, because the mean of its divisors is an integer number (82511812).

Almost surely, 2^165023623 is an apocalyptic number.

165023623 is a deficient number, since it is larger than the sum of its proper divisors (1).

165023623 is an equidigital number, since it uses as much as digits as its factorization.

165023623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 165023623 is about 12846.1520697834. The cubic root of 165023623 is about 548.5068292639.

The spelling of 165023623 in words is "one hundred sixty-five million, twenty-three thousand, six hundred twenty-three".