939947893 has 2 divisors, whose sum is σ = 939947894. Its totient is φ = 939947892.

The previous prime is 939947881. The next prime is 939947903. The reversal of 939947893 is 398749939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 937706884 + 2241009 = 30622^2 + 1497^2 .

It is a cyclic number.

It is not a de Polignac number, because 939947893 - 2⁹ = 939947381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939917893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469973946 + 469973947.

It is an arithmetic number, because the mean of its divisors is an integer number (469973947).

Almost surely, 2^939947893 is an apocalyptic number.

It is an amenable number.

939947893 is a deficient number, since it is larger than the sum of its proper divisors (1).

939947893 is an equidigital number, since it uses as much as digits as its factorization.

939947893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 61.

The square root of 939947893 is about 30658.5696502626. The cubic root of 939947893 is about 979.5680079225.

The spelling of 939947893 in words is "nine hundred thirty-nine million, nine hundred forty-seven thousand, eight hundred ninety-three".