90031245449 has 2 divisors, whose sum is σ = 90031245450. Its totient is φ = 90031245448.

The previous prime is 90031245433. The next prime is 90031245497. The reversal of 90031245449 is 94454213009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69904716025 + 20126529424 = 264395^2 + 141868^2 .

It is a cyclic number.

It is not a de Polignac number, because 90031245449 - 2⁴ = 90031245433 is a prime.

It is not a weakly prime, because it can be changed into another prime (90031245949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45015622724 + 45015622725.

It is an arithmetic number, because the mean of its divisors is an integer number (45015622725).

Almost surely, 2^90031245449 is an apocalyptic number.

It is an amenable number.

90031245449 is a deficient number, since it is larger than the sum of its proper divisors (1).

90031245449 is an equidigital number, since it uses as much as digits as its factorization.

90031245449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 90031245449 in words is "ninety billion, thirty-one million, two hundred forty-five thousand, four hundred forty-nine".