31679941 has 2 divisors, whose sum is σ = 31679942. Its totient is φ = 31679940.

The previous prime is 31679939. The next prime is 31679971. The reversal of 31679941 is 14997613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26522500 + 5157441 = 5150^2 + 2271^2 .

It is an emirp because it is prime and its reverse (14997613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31679941 - 2¹ = 31679939 is a prime.

Together with 31679939, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31679894 and 31679903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31679971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15839970 + 15839971.

It is an arithmetic number, because the mean of its divisors is an integer number (15839971).

Almost surely, 2^31679941 is an apocalyptic number.

It is an amenable number.

31679941 is a deficient number, since it is larger than the sum of its proper divisors (1).

31679941 is an equidigital number, since it uses as much as digits as its factorization.

31679941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 31679941 is about 5628.4936706014. The cubic root of 31679941 is about 316.4181993087.

The spelling of 31679941 in words is "thirty-one million, six hundred seventy-nine thousand, nine hundred forty-one".