90393239 has 2 divisors, whose sum is σ = 90393240. Its totient is φ = 90393238.

The previous prime is 90393227. The next prime is 90393269. The reversal of 90393239 is 93239309.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90393239 - 2⁴ = 90393223 is a prime.

It is a super-2 number, since 2×90393239² = 16341875313822242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90393269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45196619 + 45196620.

It is an arithmetic number, because the mean of its divisors is an integer number (45196620).

Almost surely, 2^90393239 is an apocalyptic number.

90393239 is a deficient number, since it is larger than the sum of its proper divisors (1).

90393239 is an equidigital number, since it uses as much as digits as its factorization.

90393239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 38.

The square root of 90393239 is about 9507.5359057960. The cubic root of 90393239 is about 448.7922163970.

The spelling of 90393239 in words is "ninety million, three hundred ninety-three thousand, two hundred thirty-nine".