31349687 has 2 divisors, whose sum is σ = 31349688. Its totient is φ = 31349686.

The previous prime is 31349663. The next prime is 31349701. The reversal of 31349687 is 78694313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31349687 - 2¹⁴ = 31333303 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 (31349657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15674843 + 15674844.

It is an arithmetic number, because the mean of its divisors is an integer number (15674844).

Almost surely, 2^31349687 is an apocalyptic number.

31349687 is a deficient number, since it is larger than the sum of its proper divisors (1).

31349687 is an equidigital number, since it uses as much as digits as its factorization.

31349687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 31349687 is about 5599.0791207126. The cubic root of 31349687 is about 315.3148342985.

It can be divided in two parts, 3134 and 9687, that added together give a palindrome (12821).

The spelling of 31349687 in words is "thirty-one million, three hundred forty-nine thousand, six hundred eighty-seven".