90203899 has 2 divisors, whose sum is σ = 90203900. Its totient is φ = 90203898.

The previous prime is 90203873. The next prime is 90203917. The reversal of 90203899 is 99830209.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90203899 - 2²¹ = 88106747 is a prime.

It is not a weakly prime, because it can be changed into another prime (90200899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45101949 + 45101950.

It is an arithmetic number, because the mean of its divisors is an integer number (45101950).

Almost surely, 2^90203899 is an apocalyptic number.

90203899 is a deficient number, since it is larger than the sum of its proper divisors (1).

90203899 is an equidigital number, since it uses as much as digits as its factorization.

90203899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 90203899 is about 9497.5733216438. The cubic root of 90203899 is about 448.4786467904.

The spelling of 90203899 in words is "ninety million, two hundred three thousand, eight hundred ninety-nine".