939397031 has 4 divisors (see below), whose sum is σ = 988839000. Its totient is φ = 889955064.

The previous prime is 939397021. The next prime is 939397091. The reversal of 939397031 is 130793939.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130793939 = 23 ⋅5686693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-939397031 is a prime.

It is a super-2 number, since 2×939397031² = 1764933563703229922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939397001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24720956 + ... + 24720993.

It is an arithmetic number, because the mean of its divisors is an integer number (247209750).

Almost surely, 2^939397031 is an apocalyptic number.

939397031 is a deficient number, since it is larger than the sum of its proper divisors (49441969).

939397031 is a wasteful number, since it uses less digits than its factorization.

939397031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49441968.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 939397031 is about 30649.5845159441. The cubic root of 939397031 is about 979.3766099937.

The spelling of 939397031 in words is "nine hundred thirty-nine million, three hundred ninety-seven thousand, thirty-one".