84296734921 has 81 divisors (see below), whose sum is σ = 108198155079. Its totient is φ = 65472605856.

The previous prime is 84296734919. The next prime is 84296734933. The reversal of 84296734921 is 12943769248.

The square root of 84296734921 is 290339.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 75429876025 + 8866858896 = 274645^2 + 94164^2 .

It is not a de Polignac number, because 84296734921 - 2¹ = 84296734919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84296734961) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1428758190 + ... + 1428758248.

Almost surely, 2^84296734921 is an apocalyptic number.

84296734921 is the 290339-th square number.

84296734921 is the 145170-th centered octagonal number.

It is an amenable number.

84296734921 is a deficient number, since it is larger than the sum of its proper divisors (23901420158).

84296734921 is an equidigital number, since it uses as much as digits as its factorization.

84296734921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 122 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 55.

The spelling of 84296734921 in words is "eighty-four billion, two hundred ninety-six million, seven hundred thirty-four thousand, nine hundred twenty-one".