687915446 has 4 divisors (see below), whose sum is σ = 1031873172. Its totient is φ = 343957722.

The previous prime is 687915413. The next prime is 687915499. The reversal of 687915446 is 644519786.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 687915394 and 687915403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171978860 + ... + 171978863.

It is an arithmetic number, because the mean of its divisors is an integer number (257968293).

Almost surely, 2^687915446 is an apocalyptic number.

687915446 is a deficient number, since it is larger than the sum of its proper divisors (343957726).

687915446 is a wasteful number, since it uses less digits than its factorization.

687915446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343957725.

The product of its digits is 1451520, while the sum is 50.

The square root of 687915446 is about 26228.1422521688. The cubic root of 687915446 is about 882.7648261060.

The spelling of 687915446 in words is "six hundred eighty-seven million, nine hundred fifteen thousand, four hundred forty-six".