120099391 has 2 divisors, whose sum is σ = 120099392. Its totient is φ = 120099390.

The previous prime is 120099383. The next prime is 120099401. The reversal of 120099391 is 193990021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120099391 - 2³ = 120099383 is a prime.

It is equal to p_6847090 and since 120099391 and 6847090 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120099311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60049695 + 60049696.

It is an arithmetic number, because the mean of its divisors is an integer number (60049696).

Almost surely, 2^120099391 is an apocalyptic number.

120099391 is a deficient number, since it is larger than the sum of its proper divisors (1).

120099391 is an equidigital number, since it uses as much as digits as its factorization.

120099391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 120099391 is about 10958.9867688578. The cubic root of 120099391 is about 493.3785546669.

The spelling of 120099391 in words is "one hundred twenty million, ninety-nine thousand, three hundred ninety-one".