164972501 has 4 divisors (see below), whose sum is σ = 165712512. Its totient is φ = 164232492.

The previous prime is 164972473. The next prime is 164972513. The reversal of 164972501 is 105279461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164972501 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 (164972531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369671 + ... + 370116.

It is an arithmetic number, because the mean of its divisors is an integer number (41428128).

Almost surely, 2^164972501 is an apocalyptic number.

It is an amenable number.

164972501 is a deficient number, since it is larger than the sum of its proper divisors (740011).

164972501 is an equidigital number, since it uses as much as digits as its factorization.

164972501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740010.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 164972501 is about 12844.1621369399. The cubic root of 164972501 is about 548.4501835109.

The spelling of 164972501 in words is "one hundred sixty-four million, nine hundred seventy-two thousand, five hundred one".