2881693961 has 2 divisors, whose sum is σ = 2881693962. Its totient is φ = 2881693960.

The previous prime is 2881693921. The next prime is 2881693999. The reversal of 2881693961 is 1693961882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2508006400 + 373687561 = 50080^2 + 19331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2881693961 - 2¹⁰ = 2881692937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2881693901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1440846980 + 1440846981.

It is an arithmetic number, because the mean of its divisors is an integer number (1440846981).

Almost surely, 2^2881693961 is an apocalyptic number.

It is an amenable number.

2881693961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2881693961 is an equidigital number, since it uses as much as digits as its factorization.

2881693961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 2881693961 is about 53681.4116897088. The cubic root of 2881693961 is about 1423.0362133523.

The spelling of 2881693961 in words is "two billion, eight hundred eighty-one million, six hundred ninety-three thousand, nine hundred sixty-one".