3989942427 has 4 divisors (see below), whose sum is σ = 5319923240. Its totient is φ = 2659961616.

The previous prime is 3989942339. The next prime is 3989942447. The reversal of 3989942427 is 7242499893.

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

It is not a de Polignac number, because 3989942427 - 2¹² = 3989938331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3989942447) 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, 664990402 + ... + 664990407.

It is an arithmetic number, because the mean of its divisors is an integer number (1329980810).

Almost surely, 2^3989942427 is an apocalyptic number.

3989942427 is a deficient number, since it is larger than the sum of its proper divisors (1329980813).

3989942427 is a wasteful number, since it uses less digits than its factorization.

3989942427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329980812.

The product of its digits is 7838208, while the sum is 57.

The square root of 3989942427 is about 63165.9910632296. The cubic root of 3989942427 is about 1586.0694851529.

The spelling of 3989942427 in words is "three billion, nine hundred eighty-nine million, nine hundred forty-two thousand, four hundred twenty-seven".