525117987 has 6 divisors (see below), whose sum is σ = 758503772. Its totient is φ = 350078652.

The previous prime is 525117961. The next prime is 525117997. The reversal of 525117987 is 789711525.

525117987 is a `hidden beast` number, since 52 + 511 + 7 + 9 + 87 = 666.

It is not a de Polignac number, because 525117987 - 2⁸ = 525117731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525117937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29173213 + ... + 29173230.

Almost surely, 2^525117987 is an apocalyptic number.

525117987 is a deficient number, since it is larger than the sum of its proper divisors (233385785).

525117987 is a wasteful number, since it uses less digits than its factorization.

525117987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58346449 (or 58346446 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The square root of 525117987 is about 22915.4530175600. The cubic root of 525117987 is about 806.7747513764.

The spelling of 525117987 in words is "five hundred twenty-five million, one hundred seventeen thousand, nine hundred eighty-seven".