3747416681 has 2 divisors, whose sum is σ = 3747416682. Its totient is φ = 3747416680.

The previous prime is 3747416639. The next prime is 3747416713. The reversal of 3747416681 is 1866147473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1908379225 + 1839037456 = 43685^2 + 42884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3747416681 is a prime.

It is a super-2 number, since 2×3747416681² = 28086263562074111522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3747415681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1873708340 + 1873708341.

It is an arithmetic number, because the mean of its divisors is an integer number (1873708341).

Almost surely, 2^3747416681 is an apocalyptic number.

It is an amenable number.

3747416681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3747416681 is an equidigital number, since it uses as much as digits as its factorization.

3747416681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 3747416681 is about 61216.1472244048. The cubic root of 3747416681 is about 1553.2594166793.

The spelling of 3747416681 in words is "three billion, seven hundred forty-seven million, four hundred sixteen thousand, six hundred eighty-one".