931212113 has 4 divisors (see below), whose sum is σ = 1002843828. Its totient is φ = 859580400.

The previous prime is 931212101. The next prime is 931212167. The reversal of 931212113 is 311212139.

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 70845889 + 860366224 = 8417^2 + 29332^2 .

It is a cyclic number.

It is not a de Polignac number, because 931212113 - 2¹² = 931208017 is a prime.

It is a super-5 number, since 5×931212113⁵ (a number of 46 digits) contains 55555 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (931212413) 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, 35815838 + ... + 35815863.

It is an arithmetic number, because the mean of its divisors is an integer number (250710957).

Almost surely, 2^931212113 is an apocalyptic number.

It is an amenable number.

931212113 is a deficient number, since it is larger than the sum of its proper divisors (71631715).

931212113 is a wasteful number, since it uses less digits than its factorization.

931212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71631714.

The product of its digits is 324, while the sum is 23.

The square root of 931212113 is about 30515.7682682249. The cubic root of 931212113 is about 976.5238893405.

The spelling of 931212113 in words is "nine hundred thirty-one million, two hundred twelve thousand, one hundred thirteen".