990370399 has 2 divisors, whose sum is σ = 990370400. Its totient is φ = 990370398.

The previous prime is 990370393. The next prime is 990370477. The reversal of 990370399 is 993073099.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990370399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990370393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495185199 + 495185200.

It is an arithmetic number, because the mean of its divisors is an integer number (495185200).

Almost surely, 2^990370399 is an apocalyptic number.

990370399 is a deficient number, since it is larger than the sum of its proper divisors (1).

990370399 is an equidigital number, since it uses as much as digits as its factorization.

990370399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 413343, while the sum is 49.

The square root of 990370399 is about 31470.1509211507. The cubic root of 990370399 is about 996.7797742774.

The spelling of 990370399 in words is "nine hundred ninety million, three hundred seventy thousand, three hundred ninety-nine".