3128797681943 has 2 divisors, whose sum is σ = 3128797681944. Its totient is φ = 3128797681942.

The previous prime is 3128797681913. The next prime is 3128797681967. The reversal of 3128797681943 is 3491867978213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128797681943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3128797681913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564398840971 + 1564398840972.

It is an arithmetic number, because the mean of its divisors is an integer number (1564398840972).

Almost surely, 2^{3128797681943} is an apocalyptic number.

3128797681943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128797681943 is an equidigital number, since it uses as much as digits as its factorization.

3128797681943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 68.

The spelling of 3128797681943 in words is "three trillion, one hundred twenty-eight billion, seven hundred ninety-seven million, six hundred eighty-one thousand, nine hundred forty-three".