90779417 has 2 divisors, whose sum is σ = 90779418. Its totient is φ = 90779416.

The previous prime is 90779399. The next prime is 90779431. The reversal of 90779417 is 71497709.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79192201 + 11587216 = 8899^2 + 3404^2 .

It is a cyclic number.

It is not a de Polignac number, because 90779417 - 2¹⁰ = 90778393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90779467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45389708 + 45389709.

It is an arithmetic number, because the mean of its divisors is an integer number (45389709).

Almost surely, 2^90779417 is an apocalyptic number.

It is an amenable number.

90779417 is a deficient number, since it is larger than the sum of its proper divisors (1).

90779417 is an equidigital number, since it uses as much as digits as its factorization.

90779417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 90779417 is about 9527.8233086052. The cubic root of 90779417 is about 449.4304184585.

The spelling of 90779417 in words is "ninety million, seven hundred seventy-nine thousand, four hundred seventeen".