874320297021 has 10 divisors (see below), whose sum is σ = 1306083406782. Its totient is φ = 582880197960.

The previous prime is 874320297001. The next prime is 874320297029. The reversal of 874320297021 is 120792023478.

It can be written as a sum of positive squares in only one way, i.e., 740737356921 + 133582940100 = 860661^2 + 365490^2 .

It is not a de Polignac number, because 874320297021 - 2⁷ = 874320296893 is a prime.

It is a super-2 number, since 2×874320297021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (874320297029) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5397038790 + ... + 5397038951.

Almost surely, 2^874320297021 is an apocalyptic number.

874320297021 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

874320297021 is a deficient number, since it is larger than the sum of its proper divisors (431763109761).

874320297021 is a wasteful number, since it uses less digits than its factorization.

874320297021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10794077753 (or 10794077744 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 874320297021 in words is "eight hundred seventy-four billion, three hundred twenty million, two hundred ninety-seven thousand, twenty-one".