39396881 has 2 divisors, whose sum is σ = 39396882. Its totient is φ = 39396880.

The previous prime is 39396869. The next prime is 39396883. The reversal of 39396881 is 18869393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36966400 + 2430481 = 6080^2 + 1559^2 .

It is an emirp because it is prime and its reverse (18869393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39396881 - 2⁶ = 39396817 is a prime.

It is a super-2 number, since 2×39396881² = 3104228465056322, which contains 22 as substring.

Together with 39396883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39396883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19698440 + 19698441.

It is an arithmetic number, because the mean of its divisors is an integer number (19698441).

Almost surely, 2^39396881 is an apocalyptic number.

It is an amenable number.

39396881 is a deficient number, since it is larger than the sum of its proper divisors (1).

39396881 is an equidigital number, since it uses as much as digits as its factorization.

39396881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 39396881 is about 6276.6934766643. The cubic root of 39396881 is about 340.2676122612.

The spelling of 39396881 in words is "thirty-nine million, three hundred ninety-six thousand, eight hundred eighty-one".