90751000393 has 2 divisors, whose sum is σ = 90751000394. Its totient is φ = 90751000392.

The previous prime is 90751000339. The next prime is 90751000399. The reversal of 90751000393 is 39300015709.

Together with previous prime (90751000339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60576531129 + 30174469264 = 246123^2 + 173708^2 .

It is a cyclic number.

It is not a de Polignac number, because 90751000393 - 2¹³ = 90750992201 is a prime.

It is not a weakly prime, because it can be changed into another prime (90751000399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45375500196 + 45375500197.

It is an arithmetic number, because the mean of its divisors is an integer number (45375500197).

Almost surely, 2^90751000393 is an apocalyptic number.

It is an amenable number.

90751000393 is a deficient number, since it is larger than the sum of its proper divisors (1).

90751000393 is an equidigital number, since it uses as much as digits as its factorization.

90751000393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 37.

The spelling of 90751000393 in words is "ninety billion, seven hundred fifty-one million, three hundred ninety-three", and thus it is an aban number.