90393639377 has 2 divisors, whose sum is σ = 90393639378. Its totient is φ = 90393639376.

The previous prime is 90393639293. The next prime is 90393639383. The reversal of 90393639377 is 77393639309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88092614416 + 2301024961 = 296804^2 + 47969^2 .

It is a cyclic number.

It is not a de Polignac number, because 90393639377 - 2¹⁴ = 90393622993 is a prime.

It is not a weakly prime, because it can be changed into another prime (90393639277) 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, 45196819688 + 45196819689.

It is an arithmetic number, because the mean of its divisors is an integer number (45196819689).

Almost surely, 2^90393639377 is an apocalyptic number.

It is an amenable number.

90393639377 is a deficient number, since it is larger than the sum of its proper divisors (1).

90393639377 is an equidigital number, since it uses as much as digits as its factorization.

90393639377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17360406, while the sum is 59.

The spelling of 90393639377 in words is "ninety billion, three hundred ninety-three million, six hundred thirty-nine thousand, three hundred seventy-seven".