39881036137 has 2 divisors, whose sum is σ = 39881036138. Its totient is φ = 39881036136.

The previous prime is 39881036053. The next prime is 39881036171. The reversal of 39881036137 is 73163018893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29387902041 + 10493134096 = 171429^2 + 102436^2 .

It is a cyclic number.

It is not a de Polignac number, because 39881036137 - 2³¹ = 37733552489 is a prime.

It is not a weakly prime, because it can be changed into another prime (39881036177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19940518068 + 19940518069.

It is an arithmetic number, because the mean of its divisors is an integer number (19940518069).

Almost surely, 2^39881036137 is an apocalyptic number.

It is an amenable number.

39881036137 is a deficient number, since it is larger than the sum of its proper divisors (1).

39881036137 is an equidigital number, since it uses as much as digits as its factorization.

39881036137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 39881036137 in words is "thirty-nine billion, eight hundred eighty-one million, thirty-six thousand, one hundred thirty-seven".