4243143397 has 2 divisors, whose sum is σ = 4243143398. Its totient is φ = 4243143396.

The previous prime is 4243143353. The next prime is 4243143451. The reversal of 4243143397 is 7933413424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4089730401 + 153412996 = 63951^2 + 12386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243143397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243140397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121571698 + 2121571699.

It is an arithmetic number, because the mean of its divisors is an integer number (2121571699).

Almost surely, 2^4243143397 is an apocalyptic number.

It is an amenable number.

4243143397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243143397 is an equidigital number, since it uses as much as digits as its factorization.

4243143397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 40.

The square root of 4243143397 is about 65139.4150802723. The cubic root of 4243143397 is about 1618.9343442420.

The spelling of 4243143397 in words is "four billion, two hundred forty-three million, one hundred forty-three thousand, three hundred ninety-seven".