909090977 has 2 divisors, whose sum is σ = 909090978. Its totient is φ = 909090976.

The previous prime is 909090971. The next prime is 909091013. The reversal of 909090977 is 779090909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558802321 + 350288656 = 23639^2 + 18716^2 .

It is a cyclic number.

It is not a de Polignac number, because 909090977 - 2⁴ = 909090961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (909090971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454545488 + 454545489.

It is an arithmetic number, because the mean of its divisors is an integer number (454545489).

Almost surely, 2^909090977 is an apocalyptic number.

It is an amenable number.

909090977 is a deficient number, since it is larger than the sum of its proper divisors (1).

909090977 is an equidigital number, since it uses as much as digits as its factorization.

909090977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 321489, while the sum is 50.

The square root of 909090977 is about 30151.1355839212. The cubic root of 909090977 is about 968.7293302728.

The spelling of 909090977 in words is "nine hundred nine million, ninety thousand, nine hundred seventy-seven".