39781110113 has 2 divisors, whose sum is σ = 39781110114. Its totient is φ = 39781110112.

The previous prime is 39781110043. The next prime is 39781110133. The reversal of 39781110113 is 31101118793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38483453584 + 1297656529 = 196172^2 + 36023^2 .

It is a cyclic number.

It is not a de Polignac number, because 39781110113 - 2⁸ = 39781109857 is a prime.

It is not a weakly prime, because it can be changed into another prime (39781110133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19890555056 + 19890555057.

It is an arithmetic number, because the mean of its divisors is an integer number (19890555057).

Almost surely, 2^39781110113 is an apocalyptic number.

It is an amenable number.

39781110113 is a deficient number, since it is larger than the sum of its proper divisors (1).

39781110113 is an equidigital number, since it uses as much as digits as its factorization.

39781110113 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 35.

The spelling of 39781110113 in words is "thirty-nine billion, seven hundred eighty-one million, one hundred ten thousand, one hundred thirteen".