164170639 has 2 divisors, whose sum is σ = 164170640. Its totient is φ = 164170638.

The previous prime is 164170631. The next prime is 164170663. The reversal of 164170639 is 936071461.

164170639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164170639 - 2³ = 164170631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164170598 and 164170607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164170631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82085319 + 82085320.

It is an arithmetic number, because the mean of its divisors is an integer number (82085320).

Almost surely, 2^164170639 is an apocalyptic number.

164170639 is a deficient number, since it is larger than the sum of its proper divisors (1).

164170639 is an equidigital number, since it uses as much as digits as its factorization.

164170639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 164170639 is about 12812.9090763964. The cubic root of 164170639 is about 547.5601446267.

The spelling of 164170639 in words is "one hundred sixty-four million, one hundred seventy thousand, six hundred thirty-nine".