990872041 has 2 divisors, whose sum is σ = 990872042. Its totient is φ = 990872040.

The previous prime is 990872023. The next prime is 990872101. The reversal of 990872041 is 140278099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805367641 + 185504400 = 28379^2 + 13620^2 .

It is a cyclic number.

It is not a de Polignac number, because 990872041 - 2⁹ = 990871529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990871985 and 990872003.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495436020 + 495436021.

It is an arithmetic number, because the mean of its divisors is an integer number (495436021).

Almost surely, 2^990872041 is an apocalyptic number.

It is an amenable number.

990872041 is a deficient number, since it is larger than the sum of its proper divisors (1).

990872041 is an equidigital number, since it uses as much as digits as its factorization.

990872041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 990872041 is about 31478.1200359869. The cubic root of 990872041 is about 996.9480420283.

The spelling of 990872041 in words is "nine hundred ninety million, eight hundred seventy-two thousand, forty-one".