990888071 has 2 divisors, whose sum is σ = 990888072. Its totient is φ = 990888070.

The previous prime is 990888023. The next prime is 990888079. The reversal of 990888071 is 170888099.

It is a happy number.

990888071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990888071 - 2⁶ = 990888007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990888079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495444035 + 495444036.

It is an arithmetic number, because the mean of its divisors is an integer number (495444036).

Almost surely, 2^990888071 is an apocalyptic number.

990888071 is a deficient number, since it is larger than the sum of its proper divisors (1).

990888071 is an equidigital number, since it uses as much as digits as its factorization.

990888071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 990888071 is about 31478.3746562620. The cubic root of 990888071 is about 996.9534180978.

It can be divided in two parts, 9908 and 88071, that added together give a palindrome (97979).

The spelling of 990888071 in words is "nine hundred ninety million, eight hundred eighty-eight thousand, seventy-one".