674915021 has 8 divisors (see below), whose sum is σ = 737031744. Its totient is φ = 612925120.

The previous prime is 674914997. The next prime is 674915047. The reversal of 674915021 is 120519476.

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

It is a cyclic number.

It is not a de Polignac number, because 674915021 - 2²² = 670720717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674915051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20396 + ... + 42021.

It is an arithmetic number, because the mean of its divisors is an integer number (92128968).

Almost surely, 2^674915021 is an apocalyptic number.

It is an amenable number.

674915021 is a deficient number, since it is larger than the sum of its proper divisors (62116723).

674915021 is a wasteful number, since it uses less digits than its factorization.

674915021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63411.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 674915021 is about 25979.1266404396. The cubic root of 674915021 is about 877.1685080518.

The spelling of 674915021 in words is "six hundred seventy-four million, nine hundred fifteen thousand, twenty-one".