164172793 has 2 divisors, whose sum is σ = 164172794. Its totient is φ = 164172792.

The previous prime is 164172779. The next prime is 164172817. The reversal of 164172793 is 397271461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142157929 + 22014864 = 11923^2 + 4692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164172793 is a prime.

It is a super-2 number, since 2×164172793² = 53905411922841698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164170793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82086396 + 82086397.

It is an arithmetic number, because the mean of its divisors is an integer number (82086397).

Almost surely, 2^164172793 is an apocalyptic number.

It is an amenable number.

164172793 is a deficient number, since it is larger than the sum of its proper divisors (1).

164172793 is an equidigital number, since it uses as much as digits as its factorization.

164172793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 164172793 is about 12812.9931319735. The cubic root of 164172793 is about 547.5625393695.

The spelling of 164172793 in words is "one hundred sixty-four million, one hundred seventy-two thousand, seven hundred ninety-three".