90392777 has 2 divisors, whose sum is σ = 90392778. Its totient is φ = 90392776.

The previous prime is 90392767. The next prime is 90392833. The reversal of 90392777 is 77729309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75151561 + 15241216 = 8669^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 90392777 - 2¹⁴ = 90376393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90392707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45196388 + 45196389.

It is an arithmetic number, because the mean of its divisors is an integer number (45196389).

Almost surely, 2^90392777 is an apocalyptic number.

It is an amenable number.

90392777 is a deficient number, since it is larger than the sum of its proper divisors (1).

90392777 is an equidigital number, since it uses as much as digits as its factorization.

90392777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 166698, while the sum is 44.

The square root of 90392777 is about 9507.5116092488. The cubic root of 90392777 is about 448.7914518031.

The spelling of 90392777 in words is "ninety million, three hundred ninety-two thousand, seven hundred seventy-seven".