164613623 has 2 divisors, whose sum is σ = 164613624. Its totient is φ = 164613622.

The previous prime is 164613611. The next prime is 164613637. The reversal of 164613623 is 326316461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164613623 - 2⁴ = 164613607 is a prime.

It is a super-2 number, since 2×164613623² = 54195289754372258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164613623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164616623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82306811 + 82306812.

It is an arithmetic number, because the mean of its divisors is an integer number (82306812).

Almost surely, 2^164613623 is an apocalyptic number.

164613623 is a deficient number, since it is larger than the sum of its proper divisors (1).

164613623 is an equidigital number, since it uses as much as digits as its factorization.

164613623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 164613623 is about 12830.1840594748. The cubic root of 164613623 is about 548.0521987946.

The spelling of 164613623 in words is "one hundred sixty-four million, six hundred thirteen thousand, six hundred twenty-three".