39117323961 has 9 divisors (see below), whose sum is σ = 56503658341. Its totient is φ = 26077820412.

The previous prime is 39117323953. The next prime is 39117323981. The reversal of 39117323961 is 16932371193.

The square root of 39117323961 is 197781.

It is a perfect power (a square), and thus also a powerful number.

39117323961 is a `hidden beast` number, since 3 + 91 + 173 + 2 + 396 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 39117323961 - 2³ = 39117323953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39117323981) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 560380 + ... + 626306.

Almost surely, 2^39117323961 is an apocalyptic number.

39117323961 is the 197781-st square number.

39117323961 is the 98891-st centered octagonal number.

It is an amenable number.

39117323961 is a deficient number, since it is larger than the sum of its proper divisors (17386334380).

39117323961 is an frugal number, since it uses more digits than its factorization.

39117323961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131860 (or 65930 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The spelling of 39117323961 in words is "thirty-nine billion, one hundred seventeen million, three hundred twenty-three thousand, nine hundred sixty-one".