99921383 has 2 divisors, whose sum is σ = 99921384. Its totient is φ = 99921382.

The previous prime is 99921373. The next prime is 99921391. The reversal of 99921383 is 38312999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99921383 - 2⁶ = 99921319 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99921313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49960691 + 49960692.

It is an arithmetic number, because the mean of its divisors is an integer number (49960692).

Almost surely, 2^99921383 is an apocalyptic number.

99921383 is a deficient number, since it is larger than the sum of its proper divisors (1).

99921383 is an equidigital number, since it uses as much as digits as its factorization.

99921383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 99921383 is about 9996.0683771171. The cubic root of 99921383 is about 464.0372155421.

The spelling of 99921383 in words is "ninety-nine million, nine hundred twenty-one thousand, three hundred eighty-three".