687226725 has 36 divisors (see below), whose sum is σ = 1243127652. Its totient is φ = 362880000.

The previous prime is 687226681. The next prime is 687226739. The reversal of 687226725 is 527622786.

It can be written as a sum of positive squares in 6 ways, for example, as 1153476 + 686073249 = 1074^2 + 26193^2 .

It is not a de Polignac number, because 687226725 - 2⁷ = 687226597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7605 + ... + 37845.

Almost surely, 2^687226725 is an apocalyptic number.

It is an amenable number.

687226725 is a deficient number, since it is larger than the sum of its proper divisors (555900927).

687226725 is a wasteful number, since it uses less digits than its factorization.

687226725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30358 (or 30350 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 687226725 is about 26215.0095365232. The cubic root of 687226725 is about 882.4701282198.

The spelling of 687226725 in words is "six hundred eighty-seven million, two hundred twenty-six thousand, seven hundred twenty-five".