2961237581 has 2 divisors, whose sum is σ = 2961237582. Its totient is φ = 2961237580.

The previous prime is 2961237523. The next prime is 2961237593. The reversal of 2961237581 is 1857321692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2543689225 + 417548356 = 50435^2 + 20434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2961237581 is a prime.

It is a super-2 number, since 2×2961237581² = 17537856022253463122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2961237781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1480618790 + 1480618791.

It is an arithmetic number, because the mean of its divisors is an integer number (1480618791).

Almost surely, 2^2961237581 is an apocalyptic number.

It is an amenable number.

2961237581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2961237581 is an equidigital number, since it uses as much as digits as its factorization.

2961237581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 2961237581 is about 54417.2544419507. The cubic root of 2961237581 is about 1436.0109475155.

The spelling of 2961237581 in words is "two billion, nine hundred sixty-one million, two hundred thirty-seven thousand, five hundred eighty-one".