164900639 has 8 divisors (see below), whose sum is σ = 181127040. Its totient is φ = 149429016.

The previous prime is 164900621. The next prime is 164900651. The reversal of 164900639 is 936009461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164900639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164900609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188237 + ... + 189110.

It is an arithmetic number, because the mean of its divisors is an integer number (22640880).

Almost surely, 2^164900639 is an apocalyptic number.

164900639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

164900639 is a deficient number, since it is larger than the sum of its proper divisors (16226401).

164900639 is a wasteful number, since it uses less digits than its factorization.

164900639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377389.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 164900639 is about 12841.3643745515. The cubic root of 164900639 is about 548.3705370022.

The spelling of 164900639 in words is "one hundred sixty-four million, nine hundred thousand, six hundred thirty-nine".