164117917 has 4 divisors (see below), whose sum is σ = 165315996. Its totient is φ = 162919840.

The previous prime is 164117893. The next prime is 164117939. The reversal of 164117917 is 719711461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108451396 + 55666521 = 10414^2 + 7461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164117917 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 (164117017) 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, 598834 + ... + 599107.

It is an arithmetic number, because the mean of its divisors is an integer number (41328999).

Almost surely, 2^164117917 is an apocalyptic number.

It is an amenable number.

164117917 is a deficient number, since it is larger than the sum of its proper divisors (1198079).

164117917 is a wasteful number, since it uses less digits than its factorization.

164117917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198078.

The product of its digits is 10584, while the sum is 37.

The square root of 164117917 is about 12810.8515329778. The cubic root of 164117917 is about 547.5015235948.

The spelling of 164117917 in words is "one hundred sixty-four million, one hundred seventeen thousand, nine hundred seventeen".