3181973 has 2 divisors, whose sum is σ = 3181974. Its totient is φ = 3181972.

The previous prime is 3181951. The next prime is 3181999. The reversal of 3181973 is 3791813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2696164 + 485809 = 1642^2 + 697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3181973 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3181573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1590986 + 1590987.

It is an arithmetic number, because the mean of its divisors is an integer number (1590987).

Almost surely, 2^3181973 is an apocalyptic number.

It is an amenable number.

3181973 is a deficient number, since it is larger than the sum of its proper divisors (1).

3181973 is an equidigital number, since it uses as much as digits as its factorization.

3181973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 3181973 is about 1783.8085659622. The cubic root of 3181973 is about 147.0840218750.

The spelling of 3181973 in words is "three million, one hundred eighty-one thousand, nine hundred seventy-three".