686372029 has 8 divisors (see below), whose sum is σ = 811474560. Its totient is φ = 568031856.

The previous prime is 686372009. The next prime is 686372041. The reversal of 686372029 is 920273686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 686372029 - 2⁷ = 686371901 is a prime.

It is a super-2 number, since 2×686372029² = 942213124387153682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686372009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1690369 + ... + 1690774.

It is an arithmetic number, because the mean of its divisors is an integer number (101434320).

Almost surely, 2^686372029 is an apocalyptic number.

It is an amenable number.

686372029 is a deficient number, since it is larger than the sum of its proper divisors (125102531).

686372029 is a wasteful number, since it uses less digits than its factorization.

686372029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381179.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 686372029 is about 26198.7028113989. The cubic root of 686372029 is about 882.1041371240.

The spelling of 686372029 in words is "six hundred eighty-six million, three hundred seventy-two thousand, twenty-nine".