5681249237 has 2 divisors, whose sum is σ = 5681249238. Its totient is φ = 5681249236.

The previous prime is 5681249219. The next prime is 5681249281. The reversal of 5681249237 is 7329421865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5603121316 + 78127921 = 74854^2 + 8839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5681249237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5681249191 and 5681249200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5681249207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840624618 + 2840624619.

It is an arithmetic number, because the mean of its divisors is an integer number (2840624619).

Almost surely, 2^5681249237 is an apocalyptic number.

It is an amenable number.

5681249237 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681249237 is an equidigital number, since it uses as much as digits as its factorization.

5681249237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 5681249237 is about 75374.0620969840. The cubic root of 5681249237 is about 1784.3550764078.

The spelling of 5681249237 in words is "five billion, six hundred eighty-one million, two hundred forty-nine thousand, two hundred thirty-seven".