99430392091 has 2 divisors, whose sum is σ = 99430392092. Its totient is φ = 99430392090.

The previous prime is 99430392067. The next prime is 99430392109. The reversal of 99430392091 is 19029303499.

Together with next prime (99430392109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99430392091 - 2²⁷ = 99296174363 is a prime.

It is not a weakly prime, because it can be changed into another prime (99430392011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49715196045 + 49715196046.

It is an arithmetic number, because the mean of its divisors is an integer number (49715196046).

Almost surely, 2^99430392091 is an apocalyptic number.

99430392091 is a deficient number, since it is larger than the sum of its proper divisors (1).

99430392091 is an equidigital number, since it uses as much as digits as its factorization.

99430392091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 49.

The spelling of 99430392091 in words is "ninety-nine billion, four hundred thirty million, three hundred ninety-two thousand, ninety-one".