31039061 has 2 divisors, whose sum is σ = 31039062. Its totient is φ = 31039060.

The previous prime is 31039051. The next prime is 31039069. The reversal of 31039061 is 16093013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 14161 = 5570^2 + 119^2 .

It is an emirp because it is prime and its reverse (16093013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31039061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31039069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15519530 + 15519531.

It is an arithmetic number, because the mean of its divisors is an integer number (15519531).

Almost surely, 2^31039061 is an apocalyptic number.

It is an amenable number.

31039061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31039061 is an equidigital number, since it uses as much as digits as its factorization.

31039061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 31039061 is about 5571.2710398974. The cubic root of 31039061 is about 314.2699512263.

The spelling of 31039061 in words is "thirty-one million, thirty-nine thousand, sixty-one".