39796681 has 2 divisors, whose sum is σ = 39796682. Its totient is φ = 39796680.

The previous prime is 39796567. The next prime is 39796703. The reversal of 39796681 is 18669793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 308025 = 6284^2 + 555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39796681 is a prime.

It is a super-2 number, since 2×39796681² = 3167551637231522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39796181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19898340 + 19898341.

It is an arithmetic number, because the mean of its divisors is an integer number (19898341).

Almost surely, 2^39796681 is an apocalyptic number.

It is an amenable number.

39796681 is a deficient number, since it is larger than the sum of its proper divisors (1).

39796681 is an equidigital number, since it uses as much as digits as its factorization.

39796681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 39796681 is about 6308.4610643167. The cubic root of 39796681 is about 341.4147537760.

The spelling of 39796681 in words is "thirty-nine million, seven hundred ninety-six thousand, six hundred eighty-one".