90123535291 has 2 divisors, whose sum is σ = 90123535292. Its totient is φ = 90123535290.

The previous prime is 90123535279. The next prime is 90123535309. The reversal of 90123535291 is 19253532109.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90123535291 - 2¹⁹ = 90123011003 is a prime.

It is a super-2 number, since 2×90123535291² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90123535211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45061767645 + 45061767646.

It is an arithmetic number, because the mean of its divisors is an integer number (45061767646).

Almost surely, 2^90123535291 is an apocalyptic number.

90123535291 is a deficient number, since it is larger than the sum of its proper divisors (1).

90123535291 is an equidigital number, since it uses as much as digits as its factorization.

90123535291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 90123535291 in words is "ninety billion, one hundred twenty-three million, five hundred thirty-five thousand, two hundred ninety-one".