99934391 has 2 divisors, whose sum is σ = 99934392. Its totient is φ = 99934390.

The previous prime is 99934369. The next prime is 99934403. The reversal of 99934391 is 19343999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99934391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99934301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49967195 + 49967196.

It is an arithmetic number, because the mean of its divisors is an integer number (49967196).

Almost surely, 2^99934391 is an apocalyptic number.

99934391 is a deficient number, since it is larger than the sum of its proper divisors (1).

99934391 is an equidigital number, since it uses as much as digits as its factorization.

99934391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 47.

The square root of 99934391 is about 9996.7190117558. The cubic root of 99934391 is about 464.0573511527.

The spelling of 99934391 in words is "ninety-nine million, nine hundred thirty-four thousand, three hundred ninety-one".