90490428929 has 2 divisors, whose sum is σ = 90490428930. Its totient is φ = 90490428928.

The previous prime is 90490428913. The next prime is 90490428943. The reversal of 90490428929 is 92982409409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49718742529 + 40771686400 = 222977^2 + 201920^2 .

It is a cyclic number.

It is not a de Polignac number, because 90490428929 - 2⁴ = 90490428913 is a prime.

It is not a weakly prime, because it can be changed into another prime (90490428979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45245214464 + 45245214465.

It is an arithmetic number, because the mean of its divisors is an integer number (45245214465).

Almost surely, 2^90490428929 is an apocalyptic number.

It is an amenable number.

90490428929 is a deficient number, since it is larger than the sum of its proper divisors (1).

90490428929 is an equidigital number, since it uses as much as digits as its factorization.

90490428929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 90490428929 in words is "ninety billion, four hundred ninety million, four hundred twenty-eight thousand, nine hundred twenty-nine".