90134842757 has 2 divisors, whose sum is σ = 90134842758. Its totient is φ = 90134842756.

The previous prime is 90134842727. The next prime is 90134842771. The reversal of 90134842757 is 75724843109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84053026561 + 6081816196 = 289919^2 + 77986^2 .

It is a cyclic number.

It is not a de Polignac number, because 90134842757 - 2³⁴ = 72954973573 is a prime.

It is a super-2 number, since 2×90134842757² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90134842727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45067421378 + 45067421379.

It is an arithmetic number, because the mean of its divisors is an integer number (45067421379).

Almost surely, 2^90134842757 is an apocalyptic number.

It is an amenable number.

90134842757 is a deficient number, since it is larger than the sum of its proper divisors (1).

90134842757 is an equidigital number, since it uses as much as digits as its factorization.

90134842757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 90134842757 in words is "ninety billion, one hundred thirty-four million, eight hundred forty-two thousand, seven hundred fifty-seven".