90917807 has 2 divisors, whose sum is σ = 90917808. Its totient is φ = 90917806.

The previous prime is 90917759. The next prime is 90917821. The reversal of 90917807 is 70871909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90917807 - 2¹⁴ = 90901423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90917857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45458903 + 45458904.

It is an arithmetic number, because the mean of its divisors is an integer number (45458904).

Almost surely, 2^90917807 is an apocalyptic number.

90917807 is a deficient number, since it is larger than the sum of its proper divisors (1).

90917807 is an equidigital number, since it uses as much as digits as its factorization.

90917807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 90917807 is about 9535.0829571640. The cubic root of 90917807 is about 449.6586827460.

The spelling of 90917807 in words is "ninety million, nine hundred seventeen thousand, eight hundred seven".