90611393 has 2 divisors, whose sum is σ = 90611394. Its totient is φ = 90611392.

The previous prime is 90611359. The next prime is 90611401. The reversal of 90611393 is 39311609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 42406144 = 6943^2 + 6512^2 .

It is a cyclic number.

It is not a de Polignac number, because 90611393 - 2¹⁴ = 90595009 is a prime.

It is not a weakly prime, because it can be changed into another prime (90611303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45305696 + 45305697.

It is an arithmetic number, because the mean of its divisors is an integer number (45305697).

Almost surely, 2^90611393 is an apocalyptic number.

It is an amenable number.

90611393 is a deficient number, since it is larger than the sum of its proper divisors (1).

90611393 is an equidigital number, since it uses as much as digits as its factorization.

90611393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 90611393 is about 9519.0016808487. The cubic root of 90611393 is about 449.1529629975.

Subtracting from 90611393 its sum of digits (32), we obtain a square (90611361 = 9519²).

The spelling of 90611393 in words is "ninety million, six hundred eleven thousand, three hundred ninety-three".