90776687 has 2 divisors, whose sum is σ = 90776688. Its totient is φ = 90776686.

The previous prime is 90776683. The next prime is 90776689. The reversal of 90776687 is 78667709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90776687 - 2² = 90776683 is a prime.

Together with 90776689, 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 (90776683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45388343 + 45388344.

It is an arithmetic number, because the mean of its divisors is an integer number (45388344).

Almost surely, 2^90776687 is an apocalyptic number.

90776687 is a deficient number, since it is larger than the sum of its proper divisors (1).

90776687 is an equidigital number, since it uses as much as digits as its factorization.

90776687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 90776687 is about 9527.6800429066. The cubic root of 90776687 is about 449.4259131886.

The spelling of 90776687 in words is "ninety million, seven hundred seventy-six thousand, six hundred eighty-seven".