193879117 has 2 divisors, whose sum is σ = 193879118. Its totient is φ = 193879116.

The previous prime is 193879109. The next prime is 193879139. The reversal of 193879117 is 711978391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191379556 + 2499561 = 13834^2 + 1581^2 .

It is a cyclic number.

It is not a de Polignac number, because 193879117 - 2³ = 193879109 is a prime.

It is a super-2 number, since 2×193879117² = 75178224017399378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193879157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96939558 + 96939559.

It is an arithmetic number, because the mean of its divisors is an integer number (96939559).

Almost surely, 2^193879117 is an apocalyptic number.

It is an amenable number.

193879117 is a deficient number, since it is larger than the sum of its proper divisors (1).

193879117 is an equidigital number, since it uses as much as digits as its factorization.

193879117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 46.

The square root of 193879117 is about 13924.0481541827. The cubic root of 193879117 is about 578.7757739254.

The spelling of 193879117 in words is "one hundred ninety-three million, eight hundred seventy-nine thousand, one hundred seventeen".