39368881 has 2 divisors, whose sum is σ = 39368882. Its totient is φ = 39368880.

The previous prime is 39368867. The next prime is 39368887. The reversal of 39368881 is 18886393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38328481 + 1040400 = 6191^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 39368881 - 2²⁵ = 5814449 is a prime.

It is a super-2 number, since 2×39368881² = 3099817582384322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39368887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19684440 + 19684441.

It is an arithmetic number, because the mean of its divisors is an integer number (19684441).

Almost surely, 2^39368881 is an apocalyptic number.

It is an amenable number.

39368881 is a deficient number, since it is larger than the sum of its proper divisors (1).

39368881 is an equidigital number, since it uses as much as digits as its factorization.

39368881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 39368881 is about 6274.4626064708. The cubic root of 39368881 is about 340.1869819261.

The spelling of 39368881 in words is "thirty-nine million, three hundred sixty-eight thousand, eight hundred eighty-one".