99025921 has 2 divisors, whose sum is σ = 99025922. Its totient is φ = 99025920.

The previous prime is 99025919. The next prime is 99025931. The reversal of 99025921 is 12952099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75064896 + 23961025 = 8664^2 + 4895^2 .

It is an emirp because it is prime and its reverse (12952099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99025921 - 2¹ = 99025919 is a prime.

It is a super-2 number, since 2×99025921² = 19612266059796482, which contains 22 as substring.

Together with 99025919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99025931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49512960 + 49512961.

It is an arithmetic number, because the mean of its divisors is an integer number (49512961).

Almost surely, 2^99025921 is an apocalyptic number.

It is an amenable number.

99025921 is a deficient number, since it is larger than the sum of its proper divisors (1).

99025921 is an equidigital number, since it uses as much as digits as its factorization.

99025921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 99025921 is about 9951.1768650748. The cubic root of 99025921 is about 462.6468718836.

The spelling of 99025921 in words is "ninety-nine million, twenty-five thousand, nine hundred twenty-one".