90975767 has 2 divisors, whose sum is σ = 90975768. Its totient is φ = 90975766.

The previous prime is 90975763. The next prime is 90975769. The reversal of 90975767 is 76757909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90975767 - 2² = 90975763 is a prime.

Together with 90975769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90975763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45487883 + 45487884.

It is an arithmetic number, because the mean of its divisors is an integer number (45487884).

Almost surely, 2^90975767 is an apocalyptic number.

90975767 is a deficient number, since it is larger than the sum of its proper divisors (1).

90975767 is an equidigital number, since it uses as much as digits as its factorization.

90975767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 833490, while the sum is 50.

The square root of 90975767 is about 9538.1217752763. The cubic root of 90975767 is about 449.7542147503.

The spelling of 90975767 in words is "ninety million, nine hundred seventy-five thousand, seven hundred sixty-seven".