691874674 has 4 divisors (see below), whose sum is σ = 1037812014. Its totient is φ = 345937336.

The previous prime is 691874657. The next prime is 691874681. The reversal of 691874674 is 476478196.

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

It can be written as a sum of positive squares in only one way, i.e., 526932025 + 164942649 = 22955^2 + 12843^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172968667 + ... + 172968670.

Almost surely, 2^691874674 is an apocalyptic number.

691874674 is a deficient number, since it is larger than the sum of its proper divisors (345937340).

691874674 is a wasteful number, since it uses less digits than its factorization.

691874674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345937339.

The product of its digits is 2032128, while the sum is 52.

The square root of 691874674 is about 26303.5106782346. The cubic root of 691874674 is about 884.4551420820.

The spelling of 691874674 in words is "six hundred ninety-one million, eight hundred seventy-four thousand, six hundred seventy-four".