966138939 has 12 divisors (see below), whose sum is σ = 1396038072. Its totient is φ = 643860000.

The previous prime is 966138937. The next prime is 966138947. The reversal of 966138939 is 939831669.

It is not a de Polignac number, because 966138939 - 2¹ = 966138937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (966138937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9124 + ... + 44894.

It is an arithmetic number, because the mean of its divisors is an integer number (116336506).

Almost surely, 2^966138939 is an apocalyptic number.

966138939 is a deficient number, since it is larger than the sum of its proper divisors (429899133).

966138939 is a wasteful number, since it uses less digits than its factorization.

966138939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38778 (or 38775 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 966138939 is about 31082.7756000007. The cubic root of 966138939 is about 988.5831308081.

The spelling of 966138939 in words is "nine hundred sixty-six million, one hundred thirty-eight thousand, nine hundred thirty-nine".