90449279 has 2 divisors, whose sum is σ = 90449280. Its totient is φ = 90449278.

The previous prime is 90449267. The next prime is 90449287. The reversal of 90449279 is 97294409.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90449279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90449209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45224639 + 45224640.

It is an arithmetic number, because the mean of its divisors is an integer number (45224640).

Almost surely, 2^90449279 is an apocalyptic number.

90449279 is a deficient number, since it is larger than the sum of its proper divisors (1).

90449279 is an equidigital number, since it uses as much as digits as its factorization.

90449279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 90449279 is about 9510.4825850216. The cubic root of 90449279 is about 448.8849413268.

The spelling of 90449279 in words is "ninety million, four hundred forty-nine thousand, two hundred seventy-nine".