99928693225 has 27 divisors (see below), whose sum is σ = 131664659077. Its totient is φ = 75220196480.

The previous prime is 99928693219. The next prime is 99928693237. The reversal of 99928693225 is 52239682999.

The square root of 99928693225 is 316115.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2337432409 + 97591260816 = 48347^2 + 312396^2 .

It is not a de Polignac number, because 99928693225 - 2¹⁵ = 99928660457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26867916 + ... + 26871634.

Almost surely, 2^99928693225 is an apocalyptic number.

99928693225 is the 316115-th square number.

99928693225 is the 158058-th centered octagonal number.

It is an amenable number.

99928693225 is a deficient number, since it is larger than the sum of its proper divisors (31735965852).

99928693225 is an frugal number, since it uses more digits than its factorization.

99928693225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482 (or 3741 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 64.

Multiplying 99928693225 by its sum of digits (64), we get a square (6395436366400 = 2528920²).

The spelling of 99928693225 in words is "ninety-nine billion, nine hundred twenty-eight million, six hundred ninety-three thousand, two hundred twenty-five".