99902501 has 4 divisors (see below), whose sum is σ = 104246112. Its totient is φ = 95558892.

The previous prime is 99902441. The next prime is 99902503. The reversal of 99902501 is 10520999.

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: 10520999 = 1637 ⋅6427.

It is a cyclic number.

It is not a de Polignac number, because 99902501 - 2²⁶ = 32793637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99902503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2171771 + ... + 2171816.

It is an arithmetic number, because the mean of its divisors is an integer number (26061528).

Almost surely, 2^99902501 is an apocalyptic number.

It is an amenable number.

99902501 is a deficient number, since it is larger than the sum of its proper divisors (4343611).

99902501 is a wasteful number, since it uses less digits than its factorization.

99902501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343610.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 99902501 is about 9995.1238611635. The cubic root of 99902501 is about 464.0079842190.

The spelling of 99902501 in words is "ninety-nine million, nine hundred two thousand, five hundred one".