31134643 has 2 divisors, whose sum is σ = 31134644. Its totient is φ = 31134642.

The previous prime is 31134641. The next prime is 31134659. The reversal of 31134643 is 34643113.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34643113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31134643 - 2¹ = 31134641 is a prime.

Together with 31134641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31134641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15567321 + 15567322.

It is an arithmetic number, because the mean of its divisors is an integer number (15567322).

Almost surely, 2^31134643 is an apocalyptic number.

31134643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31134643 is an equidigital number, since it uses as much as digits as its factorization.

31134643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 31134643 is about 5579.8425605029. The cubic root of 31134643 is about 314.5922093583.

Adding to 31134643 its reverse (34643113), we get a palindrome (65777756).

The spelling of 31134643 in words is "thirty-one million, one hundred thirty-four thousand, six hundred forty-three".