674325721 has 8 divisors (see below), whose sum is σ = 684833984. Its totient is φ = 663830640.

The previous prime is 674325709. The next prime is 674325739. The reversal of 674325721 is 127523476.

It is a happy number.

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

It is not a de Polignac number, because 674325721 - 2¹¹ = 674323673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674325761) 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 7 ways as a sum of consecutive naturals, for example, 165691 + ... + 169711.

It is an arithmetic number, because the mean of its divisors is an integer number (85604248).

Almost surely, 2^674325721 is an apocalyptic number.

It is an amenable number.

674325721 is a deficient number, since it is larger than the sum of its proper divisors (10508263).

674325721 is a wasteful number, since it uses less digits than its factorization.

674325721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6591.

The product of its digits is 70560, while the sum is 37.

The square root of 674325721 is about 25967.7823658471. The cubic root of 674325721 is about 876.9131347053.

It can be divided in two parts, 67432 and 5721, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 674325721 in words is "six hundred seventy-four million, three hundred twenty-five thousand, seven hundred twenty-one".