31098713 has 2 divisors, whose sum is σ = 31098714. Its totient is φ = 31098712.

The previous prime is 31098707. The next prime is 31098731. The reversal of 31098713 is 31789013.

Together with next prime (31098731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31047184 + 51529 = 5572^2 + 227^2 .

It is a cyclic number.

It is not a de Polignac number, because 31098713 - 2¹⁴ = 31082329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31098713.

It is not a weakly prime, because it can be changed into another prime (31098703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15549356 + 15549357.

It is an arithmetic number, because the mean of its divisors is an integer number (15549357).

Almost surely, 2^31098713 is an apocalyptic number.

It is an amenable number.

31098713 is a deficient number, since it is larger than the sum of its proper divisors (1).

31098713 is an equidigital number, since it uses as much as digits as its factorization.

31098713 is an evil number, because the sum of its binary digits is even.

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

The square root of 31098713 is about 5576.6220061969. The cubic root of 31098713 is about 314.4711475457.

The spelling of 31098713 in words is "thirty-one million, ninety-eight thousand, seven hundred thirteen".