4128513943 has 4 divisors (see below), whose sum is σ = 4128650128. Its totient is φ = 4128377760.

The previous prime is 4128513941. The next prime is 4128513953. The reversal of 4128513943 is 3493158214.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4128513943 - 2¹ = 4128513941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4128513896 and 4128513905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128513941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238 + ... + 90868.

It is an arithmetic number, because the mean of its divisors is an integer number (1032162532).

Almost surely, 2^4128513943 is an apocalyptic number.

4128513943 is a deficient number, since it is larger than the sum of its proper divisors (136185).

4128513943 is an equidigital number, since it uses as much as digits as its factorization.

4128513943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136184.

The product of its digits is 103680, while the sum is 40.

The square root of 4128513943 is about 64253.5130790527. The cubic root of 4128513943 is about 1604.2224334358. Note that the first 3 decimals are identical.

The spelling of 4128513943 in words is "four billion, one hundred twenty-eight million, five hundred thirteen thousand, nine hundred forty-three".