6394745243 has 2 divisors, whose sum is σ = 6394745244. Its totient is φ = 6394745242.

The previous prime is 6394745239. The next prime is 6394745251. The reversal of 6394745243 is 3425474936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6394745243 - 2² = 6394745239 is a prime.

It is a super-2 number, since 2×6394745243² = 81785533445742258098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6394745213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197372621 + 3197372622.

It is an arithmetic number, because the mean of its divisors is an integer number (3197372622).

Almost surely, 2^6394745243 is an apocalyptic number.

6394745243 is a deficient number, since it is larger than the sum of its proper divisors (1).

6394745243 is an equidigital number, since it uses as much as digits as its factorization.

6394745243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 47.

The square root of 6394745243 is about 79967.1510246551. The cubic root of 6394745243 is about 1856.1272605334.

The spelling of 6394745243 in words is "six billion, three hundred ninety-four million, seven hundred forty-five thousand, two hundred forty-three".