164623477 has 2 divisors, whose sum is σ = 164623478. Its totient is φ = 164623476.

The previous prime is 164623451. The next prime is 164623507. The reversal of 164623477 is 774326461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83010321 + 81613156 = 9111^2 + 9034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164623477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164621477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82311738 + 82311739.

It is an arithmetic number, because the mean of its divisors is an integer number (82311739).

Almost surely, 2^164623477 is an apocalyptic number.

It is an amenable number.

164623477 is a deficient number, since it is larger than the sum of its proper divisors (1).

164623477 is an equidigital number, since it uses as much as digits as its factorization.

164623477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The square root of 164623477 is about 12830.5680700427. The cubic root of 164623477 is about 548.0631342982.

The spelling of 164623477 in words is "one hundred sixty-four million, six hundred twenty-three thousand, four hundred seventy-seven".