90342424321 has 2 divisors, whose sum is σ = 90342424322. Its totient is φ = 90342424320.

The previous prime is 90342424297. The next prime is 90342424387. The reversal of 90342424321 is 12342424309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81546798096 + 8795626225 = 285564^2 + 93785^2 .

It is a cyclic number.

It is not a de Polignac number, because 90342424321 - 2³⁵ = 55982685953 is a prime.

It is a super-2 number, since 2×90342424321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90342424021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45171212160 + 45171212161.

It is an arithmetic number, because the mean of its divisors is an integer number (45171212161).

Almost surely, 2^90342424321 is an apocalyptic number.

It is an amenable number.

90342424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

90342424321 is an equidigital number, since it uses as much as digits as its factorization.

90342424321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 90342424321 in words is "ninety billion, three hundred forty-two million, four hundred twenty-four thousand, three hundred twenty-one".