90777709 has 6 divisors (see below), whose sum is σ = 99780590. Its totient is φ = 82525080.

The previous prime is 90777653. The next prime is 90777721.

90777709 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 81956809 + 8820900 = 9053^2 + 2970^2 .

It is a de Polignac number, because none of the positive numbers 2^k-90777709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90777769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374994 + ... + 375235.

Almost surely, 2^90777709 is an apocalyptic number.

It is an amenable number.

90777709 is a deficient number, since it is larger than the sum of its proper divisors (9002881).

90777709 is a wasteful number, since it uses less digits than its factorization.

90777709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750251 (or 750240 counting only the distinct ones).

The product of its (nonzero) digits is 194481, while the sum is 46.

The square root of 90777709 is about 9527.7336759588. The cubic root of 90777709 is about 449.4275997874.

The spelling of 90777709 in words is "ninety million, seven hundred seventy-seven thousand, seven hundred nine".