391252713 has 4 divisors (see below), whose sum is σ = 521670288. Its totient is φ = 260835140.

The previous prime is 391252711. The next prime is 391252723. The reversal of 391252713 is 317252193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 317252193 = 3 ⋅105750731.

It is a cyclic number.

It is not a de Polignac number, because 391252713 - 2¹ = 391252711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391252711) 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, 65208783 + ... + 65208788.

It is an arithmetic number, because the mean of its divisors is an integer number (130417572).

Almost surely, 2^391252713 is an apocalyptic number.

It is an amenable number.

391252713 is a deficient number, since it is larger than the sum of its proper divisors (130417575).

391252713 is a wasteful number, since it uses less digits than its factorization.

391252713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130417574.

The product of its digits is 11340, while the sum is 33.

The square root of 391252713 is about 19780.1090239665. The cubic root of 391252713 is about 731.3957863763.

The spelling of 391252713 in words is "three hundred ninety-one million, two hundred fifty-two thousand, seven hundred thirteen".