31348687 has 2 divisors, whose sum is σ = 31348688. Its totient is φ = 31348686.

The previous prime is 31348643. The next prime is 31348699. The reversal of 31348687 is 78684313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31348687 - 2¹¹ = 31346639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31348607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15674343 + 15674344.

It is an arithmetic number, because the mean of its divisors is an integer number (15674344).

Almost surely, 2^31348687 is an apocalyptic number.

31348687 is a deficient number, since it is larger than the sum of its proper divisors (1).

31348687 is an equidigital number, since it uses as much as digits as its factorization.

31348687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 31348687 is about 5598.9898196014. The cubic root of 31348687 is about 315.3114815995.

The spelling of 31348687 in words is "thirty-one million, three hundred forty-eight thousand, six hundred eighty-seven".