8374693021 has 4 divisors (see below), whose sum is σ = 8375670844. Its totient is φ = 8373715200.

The previous prime is 8374693007. The next prime is 8374693031. The reversal of 8374693021 is 1203964738.

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

It can be written as a sum of positive squares in 2 ways, for example, as 132595225 + 8242097796 = 11515^2 + 90786^2 .

It is a cyclic number.

It is not a de Polignac number, because 8374693021 - 2²³ = 8366304413 is a prime.

It is a super-2 number, since 2×8374693021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8374693031) 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, 475950 + ... + 493231.

It is an arithmetic number, because the mean of its divisors is an integer number (2093917711).

Almost surely, 2^8374693021 is an apocalyptic number.

It is an amenable number.

8374693021 is a deficient number, since it is larger than the sum of its proper divisors (977823).

8374693021 is an equidigital number, since it uses as much as digits as its factorization.

8374693021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977822.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 8374693021 is about 91513.3488678018. The cubic root of 8374693021 is about 2030.7492377809.

The spelling of 8374693021 in words is "eight billion, three hundred seventy-four million, six hundred ninety-three thousand, twenty-one".