39713081 has 2 divisors, whose sum is σ = 39713082. Its totient is φ = 39713080.

The previous prime is 39713053. The next prime is 39713083. The reversal of 39713081 is 18031793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28987456 + 10725625 = 5384^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 39713081 - 2⁶ = 39713017 is a prime.

It is a super-2 number, since 2×39713081² = 3154257605025122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 39713083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39713083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19856540 + 19856541.

It is an arithmetic number, because the mean of its divisors is an integer number (19856541).

Almost surely, 2^39713081 is an apocalyptic number.

It is an amenable number.

39713081 is a deficient number, since it is larger than the sum of its proper divisors (1).

39713081 is an equidigital number, since it uses as much as digits as its factorization.

39713081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 39713081 is about 6301.8315591580. The cubic root of 39713081 is about 341.1755187268.

The spelling of 39713081 in words is "thirty-nine million, seven hundred thirteen thousand, eighty-one".