687533157 has 8 divisors (see below), whose sum is σ = 1018567680. Its totient is φ = 458355420.

The previous prime is 687533123. The next prime is 687533177. The reversal of 687533157 is 751335786.

687533157 is a `hidden beast` number, since 68 + 7 + 533 + 1 + 57 = 666.

It is not a de Polignac number, because 687533157 - 2¹¹ = 687531109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687533117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12732069 + ... + 12732122.

It is an arithmetic number, because the mean of its divisors is an integer number (127320960).

Almost surely, 2^687533157 is an apocalyptic number.

It is an amenable number.

687533157 is a deficient number, since it is larger than the sum of its proper divisors (331034523).

687533157 is a wasteful number, since it uses less digits than its factorization.

687533157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25464200 (or 25464194 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 687533157 is about 26220.8534758120. The cubic root of 687533157 is about 882.6012721804.

The spelling of 687533157 in words is "six hundred eighty-seven million, five hundred thirty-three thousand, one hundred fifty-seven".