31348643 has 2 divisors, whose sum is σ = 31348644. Its totient is φ = 31348642.

The previous prime is 31348637. The next prime is 31348687. The reversal of 31348643 is 34684313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31348643 - 2⁴ = 31348627 is a prime.

It is a super-3 number, since 3×31348643³ (a number of 23 digits) contains 333 as substring.

It is equal to p_1936139 and since 31348643 and 1936139 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31348633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15674321 + 15674322.

It is an arithmetic number, because the mean of its divisors is an integer number (15674322).

Almost surely, 2^31348643 is an apocalyptic number.

31348643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31348643 is an equidigital number, since it uses as much as digits as its factorization.

31348643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 31348643 is about 5598.9858903198. The cubic root of 31348643 is about 315.3113340791.

The spelling of 31348643 in words is "thirty-one million, three hundred forty-eight thousand, six hundred forty-three".