939811973 has 2 divisors, whose sum is σ = 939811974. Its totient is φ = 939811972.

The previous prime is 939811931. The next prime is 939812009. The reversal of 939811973 is 379118939.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 785232484 + 154579489 = 28022^2 + 12433^2 .

It is an emirp because it is prime and its reverse (379118939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939811973 - 2⁶ = 939811909 is a prime.

It is a super-5 number, since 5×939811973⁵ (a number of 46 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939811373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469905986 + 469905987.

It is an arithmetic number, because the mean of its divisors is an integer number (469905987).

Almost surely, 2^939811973 is an apocalyptic number.

It is an amenable number.

939811973 is a deficient number, since it is larger than the sum of its proper divisors (1).

939811973 is an equidigital number, since it uses as much as digits as its factorization.

939811973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 939811973 is about 30656.3528978905. The cubic root of 939811973 is about 979.5207892405.

The spelling of 939811973 in words is "nine hundred thirty-nine million, eight hundred eleven thousand, nine hundred seventy-three".