612113391 has 12 divisors (see below), whose sum is σ = 887429920. Its totient is φ = 406568160.

The previous prime is 612113363. The next prime is 612113393. The reversal of 612113391 is 193311216.

612113391 is a `hidden beast` number, since 61 + 211 + 3 + 391 = 666.

It is not a de Polignac number, because 612113391 - 2¹¹ = 612111343 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 (612113393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123046 + ... + 127923.

Almost surely, 2^612113391 is an apocalyptic number.

612113391 is a deficient number, since it is larger than the sum of its proper divisors (275316529).

612113391 is a wasteful number, since it uses less digits than its factorization.

612113391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251246 (or 251243 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 612113391 is about 24740.9254273158. The cubic root of 612113391 is about 849.0709068540.

It can be divided in two parts, 612 and 113391, that added together give a triangular number (114003 = T₄₇₇).

The spelling of 612113391 in words is "six hundred twelve million, one hundred thirteen thousand, three hundred ninety-one".