990888023 has 2 divisors, whose sum is σ = 990888024. Its totient is φ = 990888022.

The previous prime is 990888013. The next prime is 990888071. The reversal of 990888023 is 320888099.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990888023 - 2⁴ = 990888007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990888013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495444011 + 495444012.

It is an arithmetic number, because the mean of its divisors is an integer number (495444012).

Almost surely, 2^990888023 is an apocalyptic number.

990888023 is a deficient number, since it is larger than the sum of its proper divisors (1).

990888023 is an equidigital number, since it uses as much as digits as its factorization.

990888023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 990888023 is about 31478.3738938338. The cubic root of 990888023 is about 996.9534019999.

The spelling of 990888023 in words is "nine hundred ninety million, eight hundred eighty-eight thousand, twenty-three".