691994734 has 4 divisors (see below), whose sum is σ = 1037992104. Its totient is φ = 345997366.

The previous prime is 691994663. The next prime is 691994747. The reversal of 691994734 is 437499196.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172998682 + ... + 172998685.

It is an arithmetic number, because the mean of its divisors is an integer number (259498026).

Almost surely, 2^691994734 is an apocalyptic number.

691994734 is a deficient number, since it is larger than the sum of its proper divisors (345997370).

691994734 is a wasteful number, since it uses less digits than its factorization.

691994734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345997369.

The product of its digits is 1469664, while the sum is 52.

The square root of 691994734 is about 26305.7927840999. The cubic root of 691994734 is about 884.5062985254.

The spelling of 691994734 in words is "six hundred ninety-one million, nine hundred ninety-four thousand, seven hundred thirty-four".