90419191 has 2 divisors, whose sum is σ = 90419192. Its totient is φ = 90419190.

The previous prime is 90419183. The next prime is 90419237. The reversal of 90419191 is 19191409.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90419191 - 2³ = 90419183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90419101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45209595 + 45209596.

It is an arithmetic number, because the mean of its divisors is an integer number (45209596).

Almost surely, 2^90419191 is an apocalyptic number.

90419191 is a deficient number, since it is larger than the sum of its proper divisors (1).

90419191 is an equidigital number, since it uses as much as digits as its factorization.

90419191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 90419191 is about 9508.9006199455. The cubic root of 90419191 is about 448.8351618698.

The spelling of 90419191 in words is "ninety million, four hundred nineteen thousand, one hundred ninety-one".