90907981441 has 2 divisors, whose sum is σ = 90907981442. Its totient is φ = 90907981440.

The previous prime is 90907981387. The next prime is 90907981447. The reversal of 90907981441 is 14418970909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57154943041 + 33753038400 = 239071^2 + 183720^2 .

It is a cyclic number.

It is not a de Polignac number, because 90907981441 - 2⁹ = 90907980929 is a prime.

It is a super-2 number, since 2×90907981441² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90907981447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45453990720 + 45453990721.

It is an arithmetic number, because the mean of its divisors is an integer number (45453990721).

Almost surely, 2^90907981441 is an apocalyptic number.

It is an amenable number.

90907981441 is a deficient number, since it is larger than the sum of its proper divisors (1).

90907981441 is an equidigital number, since it uses as much as digits as its factorization.

90907981441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 90907981441 in words is "ninety billion, nine hundred seven million, nine hundred eighty-one thousand, four hundred forty-one".