90893057491 has 2 divisors, whose sum is σ = 90893057492. Its totient is φ = 90893057490.

The previous prime is 90893057467. The next prime is 90893057513. The reversal of 90893057491 is 19475039809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90893057491 - 2¹¹ = 90893055443 is a prime.

It is not a weakly prime, because it can be changed into another prime (90893057791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45446528745 + 45446528746.

It is an arithmetic number, because the mean of its divisors is an integer number (45446528746).

Almost surely, 2^90893057491 is an apocalyptic number.

90893057491 is a deficient number, since it is larger than the sum of its proper divisors (1).

90893057491 is an equidigital number, since it uses as much as digits as its factorization.

90893057491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 90893057491 in words is "ninety billion, eight hundred ninety-three million, fifty-seven thousand, four hundred ninety-one".