691424968 has 24 divisors (see below), whose sum is σ = 1403820450. Its totient is φ = 319118592.

The previous prime is 691424959. The next prime is 691425013. The reversal of 691424968 is 869424196.

It can be written as a sum of positive squares in 3 ways, for example, as 460445764 + 230979204 = 21458^2 + 15198^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254353 + ... + 257056.

Almost surely, 2^691424968 is an apocalyptic number.

It is an amenable number.

691424968 is an abundant number, since it is smaller than the sum of its proper divisors (712395482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691424968 is a wasteful number, since it uses less digits than its factorization.

691424968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511441 (or 511424 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 691424968 is about 26294.9608860709. The cubic root of 691424968 is about 884.2634739443.

The spelling of 691424968 in words is "six hundred ninety-one million, four hundred twenty-four thousand, nine hundred sixty-eight".