90457399 has 2 divisors, whose sum is σ = 90457400. Its totient is φ = 90457398.

The previous prime is 90457373. The next prime is 90457403. The reversal of 90457399 is 99375409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90457399 - 2¹³ = 90449207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90457319) 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, 45228699 + 45228700.

It is an arithmetic number, because the mean of its divisors is an integer number (45228700).

Almost surely, 2^90457399 is an apocalyptic number.

90457399 is a deficient number, since it is larger than the sum of its proper divisors (1).

90457399 is an equidigital number, since it uses as much as digits as its factorization.

90457399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 90457399 is about 9510.9094728107. The cubic root of 90457399 is about 448.8983736677.

The spelling of 90457399 in words is "ninety million, four hundred fifty-seven thousand, three hundred ninety-nine".