990311323 has 2 divisors, whose sum is σ = 990311324. Its totient is φ = 990311322.

The previous prime is 990311297. The next prime is 990311341. The reversal of 990311323 is 323113099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990311323 - 2¹³ = 990303131 is a prime.

It is not a weakly prime, because it can be changed into another prime (990311383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495155661 + 495155662.

It is an arithmetic number, because the mean of its divisors is an integer number (495155662).

Almost surely, 2^990311323 is an apocalyptic number.

990311323 is a deficient number, since it is larger than the sum of its proper divisors (1).

990311323 is an equidigital number, since it uses as much as digits as its factorization.

990311323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 990311323 is about 31469.2123034562. The cubic root of 990311323 is about 996.7599544427.

The spelling of 990311323 in words is "nine hundred ninety million, three hundred eleven thousand, three hundred twenty-three".