90249457 has 2 divisors, whose sum is σ = 90249458. Its totient is φ = 90249456.

The previous prime is 90249451. The next prime is 90249491. The reversal of 90249457 is 75494209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 40462321 = 7056^2 + 6361^2 .

It is a cyclic number.

It is not a de Polignac number, because 90249457 - 2⁷ = 90249329 is a prime.

It is not a weakly prime, because it can be changed into another prime (90249451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45124728 + 45124729.

It is an arithmetic number, because the mean of its divisors is an integer number (45124729).

Almost surely, 2^90249457 is an apocalyptic number.

It is an amenable number.

90249457 is a deficient number, since it is larger than the sum of its proper divisors (1).

90249457 is an equidigital number, since it uses as much as digits as its factorization.

90249457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 90249457 is about 9499.9714210096. The cubic root of 90249457 is about 448.5541363263.

It can be divided in two parts, 9024 and 9457, that added together give a palindrome (18481).

The spelling of 90249457 in words is "ninety million, two hundred forty-nine thousand, four hundred fifty-seven".