687727525 has 12 divisors (see below), whose sum is σ = 864466372. Its totient is φ = 542643840.

The previous prime is 687727471. The next prime is 687727561. The reversal of 687727525 is 525727786.

It can be written as a sum of positive squares in 6 ways, for example, as 81796 + 687645729 = 286^2 + 26223^2 .

It is not a de Polignac number, because 687727525 - 2²¹ = 685630373 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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, 186594 + ... + 190243.

Almost surely, 2^687727525 is an apocalyptic number.

It is an amenable number.

687727525 is a deficient number, since it is larger than the sum of its proper divisors (176738847).

687727525 is a wasteful number, since it uses less digits than its factorization.

687727525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376920 (or 376915 counting only the distinct ones).

The product of its digits is 1646400, while the sum is 49.

The square root of 687727525 is about 26224.5595768547. The cubic root of 687727525 is about 882.6844358208.

The spelling of 687727525 in words is "six hundred eighty-seven million, seven hundred twenty-seven thousand, five hundred twenty-five".