90277249 has 2 divisors, whose sum is σ = 90277250. Its totient is φ = 90277248.

The previous prime is 90277247. The next prime is 90277309. The reversal of 90277249 is 94277209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84052224 + 6225025 = 9168^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 90277249 - 2¹ = 90277247 is a prime.

Together with 90277247, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90277247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45138624 + 45138625.

It is an arithmetic number, because the mean of its divisors is an integer number (45138625).

Almost surely, 2^90277249 is an apocalyptic number.

It is an amenable number.

90277249 is a deficient number, since it is larger than the sum of its proper divisors (1).

90277249 is an equidigital number, since it uses as much as digits as its factorization.

90277249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 90277249 is about 9501.4340496580. The cubic root of 90277249 is about 448.6001751523.

Subtracting from 90277249 its sum of digits (40), we obtain a palindrome (90277209).

The spelling of 90277249 in words is "ninety million, two hundred seventy-seven thousand, two hundred forty-nine".