687231464 has 8 divisors (see below), whose sum is σ = 1288559010. Its totient is φ = 343615728.

The previous prime is 687231437. The next prime is 687231497. The reversal of 687231464 is 464132786.

687231464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 680688100 + 6543364 = 26090^2 + 2558^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×687231464² = 944574170223166592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42951959 + ... + 42951974.

Almost surely, 2^687231464 is an apocalyptic number.

It is an amenable number.

687231464 is a deficient number, since it is larger than the sum of its proper divisors (601327546).

687231464 is a wasteful number, since it uses less digits than its factorization.

687231464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85903939 (or 85903935 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 687231464 is about 26215.0999235174. The cubic root of 687231464 is about 882.4721566704.

The spelling of 687231464 in words is "six hundred eighty-seven million, two hundred thirty-one thousand, four hundred sixty-four".