90298753849 has 2 divisors, whose sum is σ = 90298753850. Its totient is φ = 90298753848.

The previous prime is 90298753843. The next prime is 90298753861. The reversal of 90298753849 is 94835789209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64043412624 + 26255341225 = 253068^2 + 162035^2 .

It is a cyclic number.

It is not a de Polignac number, because 90298753849 - 2³¹ = 88151270201 is a prime.

It is not a weakly prime, because it can be changed into another prime (90298753843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45149376924 + 45149376925.

It is an arithmetic number, because the mean of its divisors is an integer number (45149376925).

Almost surely, 2^90298753849 is an apocalyptic number.

It is an amenable number.

90298753849 is a deficient number, since it is larger than the sum of its proper divisors (1).

90298753849 is an equidigital number, since it uses as much as digits as its factorization.

90298753849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 90298753849 in words is "ninety billion, two hundred ninety-eight million, seven hundred fifty-three thousand, eight hundred forty-nine".