99925217 has 4 divisors (see below), whose sum is σ = 114200256. Its totient is φ = 85650180.

The previous prime is 99925157. The next prime is 99925219. The reversal of 99925217 is 71252999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71252999 = 97 ⋅734567.

It is not a de Polignac number, because 99925217 - 2¹⁸ = 99663073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99925219) 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, 7137509 + ... + 7137522.

It is an arithmetic number, because the mean of its divisors is an integer number (28550064).

Almost surely, 2^99925217 is an apocalyptic number.

It is an amenable number.

99925217 is a deficient number, since it is larger than the sum of its proper divisors (14275039).

99925217 is a wasteful number, since it uses less digits than its factorization.

99925217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14275038.

The product of its digits is 102060, while the sum is 44.

The square root of 99925217 is about 9996.2601506764. The cubic root of 99925217 is about 464.0431505277.

The spelling of 99925217 in words is "ninety-nine million, nine hundred twenty-five thousand, two hundred seventeen".