90393639461 has 2 divisors, whose sum is σ = 90393639462. Its totient is φ = 90393639460.

The previous prime is 90393639383. The next prime is 90393639491. The reversal of 90393639461 is 16493639309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88051660225 + 2341979236 = 296735^2 + 48394^2 .

It is a cyclic number.

It is not a de Polignac number, because 90393639461 - 2¹⁸ = 90393377317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90393639491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45196819730 + 45196819731.

It is an arithmetic number, because the mean of its divisors is an integer number (45196819731).

Almost surely, 2^90393639461 is an apocalyptic number.

It is an amenable number.

90393639461 is a deficient number, since it is larger than the sum of its proper divisors (1).

90393639461 is an equidigital number, since it uses as much as digits as its factorization.

90393639461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 53.

The spelling of 90393639461 in words is "ninety billion, three hundred ninety-three million, six hundred thirty-nine thousand, four hundred sixty-one".