99897084225 has 81 divisors (see below), whose sum is σ = 189010051113. Its totient is φ = 50428802880.

The previous prime is 99897084223. The next prime is 99897084227. The reversal of 99897084225 is 52248079899.

It is a happy number.

The square root of 99897084225 is 316065.

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

It is an interprime number because it is at equal distance from previous prime (99897084223) and next prime (99897084227).

It can be written as a sum of positive squares in 4 ways, for example, as 51387902721 + 48509181504 = 226689^2 + 220248^2 .

It is not a de Polignac number, because 99897084225 - 2¹ = 99897084223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99897084223) 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, 90077971 + ... + 90079079.

Almost surely, 2^99897084225 is an apocalyptic number.

99897084225 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99897084225 is the 316065-th square number.

99897084225 is the 158033-rd centered octagonal number.

It is an amenable number.

99897084225 is a deficient number, since it is larger than the sum of its proper divisors (89112966888).

99897084225 is a wasteful number, since it uses less digits than its factorization.

99897084225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 99897084225 in words is "ninety-nine billion, eight hundred ninety-seven million, eighty-four thousand, two hundred twenty-five".