90008400191 has 2 divisors, whose sum is σ = 90008400192. Its totient is φ = 90008400190.

The previous prime is 90008400109. The next prime is 90008400197. The reversal of 90008400191 is 19100480009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90008400191 - 2¹⁰ = 90008399167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90008400197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45004200095 + 45004200096.

It is an arithmetic number, because the mean of its divisors is an integer number (45004200096).

Almost surely, 2^90008400191 is an apocalyptic number.

90008400191 is a deficient number, since it is larger than the sum of its proper divisors (1).

90008400191 is an equidigital number, since it uses as much as digits as its factorization.

90008400191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 90008400191 in words is "ninety billion, eight million, four hundred thousand, one hundred ninety-one".