3988172939 has 2 divisors, whose sum is σ = 3988172940. Its totient is φ = 3988172938.

The previous prime is 3988172933. The next prime is 3988172957. The reversal of 3988172939 is 9392718893.

It is a weak prime.

It is an emirp because it is prime and its reverse (9392718893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3988172939 - 2²⁴ = 3971395723 is a prime.

It is not a weakly prime, because it can be changed into another prime (3988172933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994086469 + 1994086470.

It is an arithmetic number, because the mean of its divisors is an integer number (1994086470).

Almost surely, 2^3988172939 is an apocalyptic number.

3988172939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988172939 is an equidigital number, since it uses as much as digits as its factorization.

3988172939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 3988172939 is about 63151.9828588145. The cubic root of 3988172939 is about 1585.8349833640.

The spelling of 3988172939 in words is "three billion, nine hundred eighty-eight million, one hundred seventy-two thousand, nine hundred thirty-nine".