2780961613 has 2 divisors, whose sum is σ = 2780961614. Its totient is φ = 2780961612.

The previous prime is 2780961611. The next prime is 2780961683. The reversal of 2780961613 is 3161690872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1983633444 + 797328169 = 44538^2 + 28237^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780961613 - 2¹ = 2780961611 is a prime.

Together with 2780961611, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2780961613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2780961611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390480806 + 1390480807.

It is an arithmetic number, because the mean of its divisors is an integer number (1390480807).

Almost surely, 2^2780961613 is an apocalyptic number.

It is an amenable number.

2780961613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780961613 is an equidigital number, since it uses as much as digits as its factorization.

2780961613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 2780961613 is about 52734.8235324629. The cubic root of 2780961613 is about 1406.2579738991.

The spelling of 2780961613 in words is "two billion, seven hundred eighty million, nine hundred sixty-one thousand, six hundred thirteen".