990872023 has 2 divisors, whose sum is σ = 990872024. Its totient is φ = 990872022.

The previous prime is 990871961. The next prime is 990872041. The reversal of 990872023 is 320278099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990872023 - 2¹³ = 990863831 is a prime.

It is a super-2 number, since 2×990872023² = 1963654731928225058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990872123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495436011 + 495436012.

It is an arithmetic number, because the mean of its divisors is an integer number (495436012).

Almost surely, 2^990872023 is an apocalyptic number.

990872023 is a deficient number, since it is larger than the sum of its proper divisors (1).

990872023 is an equidigital number, since it uses as much as digits as its factorization.

990872023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 990872023 is about 31478.1197500740. The cubic root of 990872023 is about 996.9480359915.

The spelling of 990872023 in words is "nine hundred ninety million, eight hundred seventy-two thousand, twenty-three".