674012491 has 4 divisors (see below), whose sum is σ = 680685984. Its totient is φ = 667339000.

The previous prime is 674012483. The next prime is 674012527. The reversal of 674012491 is 194210476.

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

It is a cyclic number.

It is not a de Polignac number, because 674012491 - 2³ = 674012483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674012191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336595 + ... + 3336796.

It is an arithmetic number, because the mean of its divisors is an integer number (170171496).

Almost surely, 2^674012491 is an apocalyptic number.

674012491 is a deficient number, since it is larger than the sum of its proper divisors (6673493).

674012491 is a wasteful number, since it uses less digits than its factorization.

674012491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673492.

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

The square root of 674012491 is about 25961.7505380512. The cubic root of 674012491 is about 876.7773358209. Note that the first 3 decimals are identical.

The spelling of 674012491 in words is "six hundred seventy-four million, twelve thousand, four hundred ninety-one".