3989402743 has 4 divisors (see below), whose sum is σ = 3989570760. Its totient is φ = 3989234728.

The previous prime is 3989402731. The next prime is 3989402749. The reversal of 3989402743 is 3472049893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3989402743 - 2²⁵ = 3955848311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989402749) 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, 41080 + ... + 98317.

It is an arithmetic number, because the mean of its divisors is an integer number (997392690).

Almost surely, 2^3989402743 is an apocalyptic number.

3989402743 is a deficient number, since it is larger than the sum of its proper divisors (168017).

3989402743 is a wasteful number, since it uses less digits than its factorization.

3989402743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168016.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 3989402743 is about 63161.7189680585. The cubic root of 3989402743 is about 1585.9979707609.

The spelling of 3989402743 in words is "three billion, nine hundred eighty-nine million, four hundred two thousand, seven hundred forty-three".