90745279 has 2 divisors, whose sum is σ = 90745280. Its totient is φ = 90745278.

The previous prime is 90745261. The next prime is 90745331. The reversal of 90745279 is 97254709.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90745279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90745229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45372639 + 45372640.

It is an arithmetic number, because the mean of its divisors is an integer number (45372640).

Almost surely, 2^90745279 is an apocalyptic number.

90745279 is a deficient number, since it is larger than the sum of its proper divisors (1).

90745279 is an equidigital number, since it uses as much as digits as its factorization.

90745279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 90745279 is about 9526.0316501679. The cubic root of 90745279 is about 449.3740746317.

The spelling of 90745279 in words is "ninety million, seven hundred forty-five thousand, two hundred seventy-nine".