691140274 has 8 divisors (see below), whose sum is σ = 1130956848. Its totient is φ = 314154660.

The previous prime is 691140251. The next prime is 691140323. The reversal of 691140274 is 472041196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15707712 + ... + 15707755.

It is an arithmetic number, because the mean of its divisors is an integer number (141369606).

Almost surely, 2^691140274 is an apocalyptic number.

691140274 is a deficient number, since it is larger than the sum of its proper divisors (439816574).

691140274 is a wasteful number, since it uses less digits than its factorization.

691140274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31415480.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 691140274 is about 26289.5468580194. The cubic root of 691140274 is about 884.1420922196.

The spelling of 691140274 in words is "six hundred ninety-one million, one hundred forty thousand, two hundred seventy-four".