99132391 has 2 divisors, whose sum is σ = 99132392. Its totient is φ = 99132390.

The previous prime is 99132373. The next prime is 99132427. The reversal of 99132391 is 19323199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99132391 - 2⁵ = 99132359 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99132391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99132791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49566195 + 49566196.

It is an arithmetic number, because the mean of its divisors is an integer number (49566196).

Almost surely, 2^99132391 is an apocalyptic number.

99132391 is a deficient number, since it is larger than the sum of its proper divisors (1).

99132391 is an equidigital number, since it uses as much as digits as its factorization.

99132391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 37.

The square root of 99132391 is about 9956.5250464206. The cubic root of 99132391 is about 462.8126209753.

The spelling of 99132391 in words is "ninety-nine million, one hundred thirty-two thousand, three hundred ninety-one".