31316687 has 2 divisors, whose sum is σ = 31316688. Its totient is φ = 31316686.

The previous prime is 31316683. The next prime is 31316699. The reversal of 31316687 is 78661313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31316687 - 2² = 31316683 is a prime.

It is a Chen prime.

It is equal to p_1934297 and since 31316687 and 1934297 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31316683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15658343 + 15658344.

It is an arithmetic number, because the mean of its divisors is an integer number (15658344).

Almost surely, 2^31316687 is an apocalyptic number.

31316687 is a deficient number, since it is larger than the sum of its proper divisors (1).

31316687 is an equidigital number, since it uses as much as digits as its factorization.

31316687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 31316687 is about 5596.1314316231. The cubic root of 31316687 is about 315.2041575665.

The spelling of 31316687 in words is "thirty-one million, three hundred sixteen thousand, six hundred eighty-seven".