686890725 has 12 divisors (see below), whose sum is σ = 1135659456. Its totient is φ = 366341680.

The previous prime is 686890691. The next prime is 686890733. The reversal of 686890725 is 527098686.

It is not a de Polignac number, because 686890725 - 2¹⁰ = 686889701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4579197 + ... + 4579346.

It is an arithmetic number, because the mean of its divisors is an integer number (94638288).

Almost surely, 2^686890725 is an apocalyptic number.

It is an amenable number.

686890725 is a deficient number, since it is larger than the sum of its proper divisors (448768731).

686890725 is a wasteful number, since it uses less digits than its factorization.

686890725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158556 (or 9158551 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 686890725 is about 26208.6002106179. The cubic root of 686890725 is about 882.3262852013.

The spelling of 686890725 in words is "six hundred eighty-six million, eight hundred ninety thousand, seven hundred twenty-five".