2780875961 has 2 divisors, whose sum is σ = 2780875962. Its totient is φ = 2780875960.

The previous prime is 2780875913. The next prime is 2780876023. The reversal of 2780875961 is 1695780872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1806250000 + 974625961 = 42500^2 + 31219^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780875961 - 2⁶ = 2780875897 is a prime.

It is a super-2 number, since 2×2780875961² = 15466542220935347042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2780872961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390437980 + 1390437981.

It is an arithmetic number, because the mean of its divisors is an integer number (1390437981).

Almost surely, 2^2780875961 is an apocalyptic number.

It is an amenable number.

2780875961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780875961 is an equidigital number, since it uses as much as digits as its factorization.

2780875961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The square root of 2780875961 is about 52734.0114252652. The cubic root of 2780875961 is about 1406.2435364417.

The spelling of 2780875961 in words is "two billion, seven hundred eighty million, eight hundred seventy-five thousand, nine hundred sixty-one".