990835451 has 2 divisors, whose sum is σ = 990835452. Its totient is φ = 990835450.

The previous prime is 990835441. The next prime is 990835471. The reversal of 990835451 is 154538099.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (154538099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990835451 - 2⁶ = 990835387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990835441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495417725 + 495417726.

It is an arithmetic number, because the mean of its divisors is an integer number (495417726).

Almost surely, 2^990835451 is an apocalyptic number.

990835451 is a deficient number, since it is larger than the sum of its proper divisors (1).

990835451 is an equidigital number, since it uses as much as digits as its factorization.

990835451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 990835451 is about 31477.5388332697. The cubic root of 990835451 is about 996.9357704210.

The spelling of 990835451 in words is "nine hundred ninety million, eight hundred thirty-five thousand, four hundred fifty-one".