31709941 has 2 divisors, whose sum is σ = 31709942. Its totient is φ = 31709940.

The previous prime is 31709927. The next prime is 31709987. The reversal of 31709941 is 14990713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 9947716 = 4665^2 + 3154^2 .

It is a cyclic number.

It is not a de Polignac number, because 31709941 - 2¹³ = 31701749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31709897 and 31709906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31709911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15854970 + 15854971.

It is an arithmetic number, because the mean of its divisors is an integer number (15854971).

Almost surely, 2^31709941 is an apocalyptic number.

It is an amenable number.

31709941 is a deficient number, since it is larger than the sum of its proper divisors (1).

31709941 is an equidigital number, since it uses as much as digits as its factorization.

31709941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 31709941 is about 5631.1580514136. The cubic root of 31709941 is about 316.5180474657.

The spelling of 31709941 in words is "thirty-one million, seven hundred nine thousand, nine hundred forty-one".