90790191 has 6 divisors (see below), whose sum is σ = 131141400. Its totient is φ = 60526788.

The previous prime is 90790187. The next prime is 90790201. The reversal of 90790191 is 19109709.

It is not a de Polignac number, because 90790191 - 2² = 90790187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90790111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5043891 + ... + 5043908.

It is an arithmetic number, because the mean of its divisors is an integer number (21856900).

Almost surely, 2^90790191 is an apocalyptic number.

90790191 is a deficient number, since it is larger than the sum of its proper divisors (40351209).

90790191 is a wasteful number, since it uses less digits than its factorization.

90790191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10087805 (or 10087802 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 90790191 is about 9528.3886885454. The cubic root of 90790191 is about 449.4481977156.

The spelling of 90790191 in words is "ninety million, seven hundred ninety thousand, one hundred ninety-one".