99426391 has 2 divisors, whose sum is σ = 99426392. Its totient is φ = 99426390.

The previous prime is 99426347. The next prime is 99426409. The reversal of 99426391 is 19362499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99426391 - 2¹³ = 99418199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99426311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49713195 + 49713196.

It is an arithmetic number, because the mean of its divisors is an integer number (49713196).

Almost surely, 2^99426391 is an apocalyptic number.

99426391 is a deficient number, since it is larger than the sum of its proper divisors (1).

99426391 is an equidigital number, since it uses as much as digits as its factorization.

99426391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 99426391 is about 9971.2783032067. The cubic root of 99426391 is about 463.2696953239.

The spelling of 99426391 in words is "ninety-nine million, four hundred twenty-six thousand, three hundred ninety-one".