90973391 has 2 divisors, whose sum is σ = 90973392. Its totient is φ = 90973390.

The previous prime is 90973369. The next prime is 90973429. The reversal of 90973391 is 19337909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90973391 - 2⁶ = 90973327 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90973321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45486695 + 45486696.

It is an arithmetic number, because the mean of its divisors is an integer number (45486696).

Almost surely, 2^90973391 is an apocalyptic number.

90973391 is a deficient number, since it is larger than the sum of its proper divisors (1).

90973391 is an equidigital number, since it uses as much as digits as its factorization.

90973391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 90973391 is about 9537.9972216394. The cubic root of 90973391 is about 449.7502993292.

The spelling of 90973391 in words is "ninety million, nine hundred seventy-three thousand, three hundred ninety-one".