691012708 has 6 divisors (see below), whose sum is σ = 1209272246. Its totient is φ = 345506352.

The previous prime is 691012687. The next prime is 691012711. The reversal of 691012708 is 807210196.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 686859264 + 4153444 = 26208^2 + 2038^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86376585 + ... + 86376592.

Almost surely, 2^691012708 is an apocalyptic number.

It is an amenable number.

691012708 is a deficient number, since it is larger than the sum of its proper divisors (518259538).

691012708 is a wasteful number, since it uses less digits than its factorization.

691012708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172753181 (or 172753179 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 691012708 is about 26287.1205726302. The cubic root of 691012708 is about 884.0876925489.

The spelling of 691012708 in words is "six hundred ninety-one million, twelve thousand, seven hundred eight".