687974422 has 16 divisors (see below), whose sum is σ = 1045836000. Its totient is φ = 339393600.

The previous prime is 687974387. The next prime is 687974437. The reversal of 687974422 is 224479786.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37354 + ... + 52642.

It is an arithmetic number, because the mean of its divisors is an integer number (65364750).

Almost surely, 2^687974422 is an apocalyptic number.

687974422 is a deficient number, since it is larger than the sum of its proper divisors (357861578).

687974422 is a wasteful number, since it uses less digits than its factorization.

687974422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15591.

The product of its digits is 1354752, while the sum is 49.

The square root of 687974422 is about 26229.2665166222. The cubic root of 687974422 is about 882.7900522929.

The spelling of 687974422 in words is "six hundred eighty-seven million, nine hundred seventy-four thousand, four hundred twenty-two".