687153506 has 32 divisors (see below), whose sum is σ = 1173009600. Its totient is φ = 299280960.

The previous prime is 687153499. The next prime is 687153527. The reversal of 687153506 is 605351786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130301 + ... + 135471.

It is an arithmetic number, because the mean of its divisors is an integer number (36656550).

Almost surely, 2^687153506 is an apocalyptic number.

687153506 is a deficient number, since it is larger than the sum of its proper divisors (485856094).

687153506 is a wasteful number, since it uses less digits than its factorization.

687153506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 687153506 is about 26213.6129902003. The cubic root of 687153506 is about 882.4387868527.

The spelling of 687153506 in words is "six hundred eighty-seven million, one hundred fifty-three thousand, five hundred six".