90249451 has 2 divisors, whose sum is σ = 90249452. Its totient is φ = 90249450.

The previous prime is 90249431. The next prime is 90249457. The reversal of 90249451 is 15494209.

It is a strong prime.

It is an emirp because it is prime and its reverse (15494209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90249451 - 2²³ = 81860843 is a prime.

It is not a weakly prime, because it can be changed into another prime (90249457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45124725 + 45124726.

It is an arithmetic number, because the mean of its divisors is an integer number (45124726).

Almost surely, 2^90249451 is an apocalyptic number.

90249451 is a deficient number, since it is larger than the sum of its proper divisors (1).

90249451 is an equidigital number, since it uses as much as digits as its factorization.

90249451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 90249451 is about 9499.9711052192. The cubic root of 90249451 is about 448.5541263860.

The spelling of 90249451 in words is "ninety million, two hundred forty-nine thousand, four hundred fifty-one".