939431997 has 24 divisors (see below), whose sum is σ = 1565875584. Its totient is φ = 531602784.

The previous prime is 939431981. The next prime is 939432017. The reversal of 939431997 is 799134939.

It is not a de Polignac number, because 939431997 - 2⁴ = 939431981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939431957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65898 + ... + 78875.

It is an arithmetic number, because the mean of its divisors is an integer number (65244816).

Almost surely, 2^939431997 is an apocalyptic number.

It is an amenable number.

939431997 is a deficient number, since it is larger than the sum of its proper divisors (626443587).

939431997 is a wasteful number, since it uses less digits than its factorization.

939431997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144889 (or 144886 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 54.

The square root of 939431997 is about 30650.1549261990. The cubic root of 939431997 is about 979.3887612129.

The spelling of 939431997 in words is "nine hundred thirty-nine million, four hundred thirty-one thousand, nine hundred ninety-seven".