164774621 has 8 divisors (see below), whose sum is σ = 183579264. Its totient is φ = 146607520.

The previous prime is 164774609. The next prime is 164774627. The reversal of 164774621 is 126477461.

It is a happy number.

164774621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-164774621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164774627) 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, 158840 + ... + 159873.

It is an arithmetic number, because the mean of its divisors is an integer number (22947408).

Almost surely, 2^164774621 is an apocalyptic number.

164774621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164774621 is a deficient number, since it is larger than the sum of its proper divisors (18804643).

164774621 is a wasteful number, since it uses less digits than its factorization.

164774621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318771.

The product of its digits is 56448, while the sum is 38.

The square root of 164774621 is about 12836.4567151531. The cubic root of 164774621 is about 548.2308121158.

The spelling of 164774621 in words is "one hundred sixty-four million, seven hundred seventy-four thousand, six hundred twenty-one".