674404721 has 4 divisors (see below), whose sum is σ = 696159744. Its totient is φ = 652649700.

The previous prime is 674404693. The next prime is 674404723. The reversal of 674404721 is 127404476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674404721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674404723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10877465 + ... + 10877526.

It is an arithmetic number, because the mean of its divisors is an integer number (174039936).

Almost surely, 2^674404721 is an apocalyptic number.

It is an amenable number.

674404721 is a deficient number, since it is larger than the sum of its proper divisors (21755023).

674404721 is a wasteful number, since it uses less digits than its factorization.

674404721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21755022.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 674404721 is about 25969.3034369426. The cubic root of 674404721 is about 876.9473780145.

The spelling of 674404721 in words is "six hundred seventy-four million, four hundred four thousand, seven hundred twenty-one".