90449287 has 2 divisors, whose sum is σ = 90449288. Its totient is φ = 90449286.

The previous prime is 90449279. The next prime is 90449297. The reversal of 90449287 is 78294409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90449287 - 2³ = 90449279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90449207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45224643 + 45224644.

It is an arithmetic number, because the mean of its divisors is an integer number (45224644).

Almost surely, 2^90449287 is an apocalyptic number.

90449287 is a deficient number, since it is larger than the sum of its proper divisors (1).

90449287 is an equidigital number, since it uses as much as digits as its factorization.

90449287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 90449287 is about 9510.4830056102. The cubic root of 90449287 is about 448.8849545610.

The spelling of 90449287 in words is "ninety million, four hundred forty-nine thousand, two hundred eighty-seven".