686058031 has 2 divisors, whose sum is σ = 686058032. Its totient is φ = 686058030.

The previous prime is 686057989. The next prime is 686058047. The reversal of 686058031 is 130850686.

686058031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686058031 - 2⁷ = 686057903 is a prime.

It is a super-2 number, since 2×686058031² = 941351243799193922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686058731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343029015 + 343029016.

It is an arithmetic number, because the mean of its divisors is an integer number (343029016).

Almost surely, 2^686058031 is an apocalyptic number.

686058031 is a deficient number, since it is larger than the sum of its proper divisors (1).

686058031 is an equidigital number, since it uses as much as digits as its factorization.

686058031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 686058031 is about 26192.7095009279. The cubic root of 686058031 is about 881.9696030954.

It can be divided in two parts, 68605 and 8031, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 686058031 in words is "six hundred eighty-six million, fifty-eight thousand, thirty-one".