90777469 has 2 divisors, whose sum is σ = 90777470. Its totient is φ = 90777468.

The previous prime is 90777451. The next prime is 90777493. The reversal of 90777469 is 96477709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60637369 + 30140100 = 7787^2 + 5490^2 .

It is a cyclic number.

It is not a de Polignac number, because 90777469 - 2⁵ = 90777437 is a prime.

It is a super-2 number, since 2×90777469² = 16481097756091922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90777769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45388734 + 45388735.

It is an arithmetic number, because the mean of its divisors is an integer number (45388735).

Almost surely, 2^90777469 is an apocalyptic number.

It is an amenable number.

90777469 is a deficient number, since it is larger than the sum of its proper divisors (1).

90777469 is an equidigital number, since it uses as much as digits as its factorization.

90777469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 90777469 is about 9527.7210811400. The cubic root of 90777469 is about 449.4272037184.

The spelling of 90777469 in words is "ninety million, seven hundred seventy-seven thousand, four hundred sixty-nine".