685995937 has 8 divisors (see below), whose sum is σ = 748556640. Its totient is φ = 623468160.

The previous prime is 685995911. The next prime is 685995943. The reversal of 685995937 is 739599586.

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

It is a cyclic number.

It is not a de Polignac number, because 685995937 - 2⁷ = 685995809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685995977) 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, 59889 + ... + 70417.

It is an arithmetic number, because the mean of its divisors is an integer number (93569580).

Almost surely, 2^685995937 is an apocalyptic number.

It is an amenable number.

685995937 is a deficient number, since it is larger than the sum of its proper divisors (62560703).

685995937 is a wasteful number, since it uses less digits than its factorization.

685995937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16463.

The product of its digits is 18370800, while the sum is 61.

The square root of 685995937 is about 26191.5241442723. The cubic root of 685995937 is about 881.9429937464.

The spelling of 685995937 in words is "six hundred eighty-five million, nine hundred ninety-five thousand, nine hundred thirty-seven".