39988903943 has 2 divisors, whose sum is σ = 39988903944. Its totient is φ = 39988903942.

The previous prime is 39988903891. The next prime is 39988903963. The reversal of 39988903943 is 34930988993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39988903943 - 2¹⁴ = 39988887559 is a prime.

It is a super-3 number, since 3×39988903943³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39988903943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39988903963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19994451971 + 19994451972.

It is an arithmetic number, because the mean of its divisors is an integer number (19994451972).

Almost surely, 2^39988903943 is an apocalyptic number.

39988903943 is a deficient number, since it is larger than the sum of its proper divisors (1).

39988903943 is an equidigital number, since it uses as much as digits as its factorization.

39988903943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45349632, while the sum is 65.

The spelling of 39988903943 in words is "thirty-nine billion, nine hundred eighty-eight million, nine hundred three thousand, nine hundred forty-three".