90225331393 has 2 divisors, whose sum is σ = 90225331394. Its totient is φ = 90225331392.

The previous prime is 90225331387. The next prime is 90225331499. The reversal of 90225331393 is 39313352209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76335058944 + 13890272449 = 276288^2 + 117857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90225331393 is a prime.

It is a super-2 number, since 2×90225331393² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90225331303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45112665696 + 45112665697.

It is an arithmetic number, because the mean of its divisors is an integer number (45112665697).

Almost surely, 2^90225331393 is an apocalyptic number.

It is an amenable number.

90225331393 is a deficient number, since it is larger than the sum of its proper divisors (1).

90225331393 is an equidigital number, since it uses as much as digits as its factorization.

90225331393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 40.

The spelling of 90225331393 in words is "ninety billion, two hundred twenty-five million, three hundred thirty-one thousand, three hundred ninety-three".