2999881961 has 2 divisors, whose sum is σ = 2999881962. Its totient is φ = 2999881960.

The previous prime is 2999881949. The next prime is 2999881981. The reversal of 2999881961 is 1691889992.

2999881961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1718599936 + 1281282025 = 41456^2 + 35795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2999881961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2999881894 and 2999881903.

It is not a weakly prime, because it can be changed into another prime (2999881981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1499940980 + 1499940981.

It is an arithmetic number, because the mean of its divisors is an integer number (1499940981).

Almost surely, 2^2999881961 is an apocalyptic number.

It is an amenable number.

2999881961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2999881961 is an equidigital number, since it uses as much as digits as its factorization.

2999881961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 62.

The square root of 2999881961 is about 54771.1781962010. The cubic root of 2999881961 is about 1442.2306543152.

The spelling of 2999881961 in words is "two billion, nine hundred ninety-nine million, eight hundred eighty-one thousand, nine hundred sixty-one".