3989506859 has 4 divisors (see below), whose sum is σ = 4296392016. Its totient is φ = 3682621704.

The previous prime is 3989506853. The next prime is 3989506891. The reversal of 3989506859 is 9586059893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9586059893 = 6983 ⋅1372771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3989506859 is a prime.

It is a super-3 number, since 3×3989506859³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3989506853) 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, 153442559 + ... + 153442584.

It is an arithmetic number, because the mean of its divisors is an integer number (1074098004).

Almost surely, 2^3989506859 is an apocalyptic number.

3989506859 is a deficient number, since it is larger than the sum of its proper divisors (306885157).

3989506859 is a wasteful number, since it uses less digits than its factorization.

3989506859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306885156.

The product of its (nonzero) digits is 20995200, while the sum is 62.

The square root of 3989506859 is about 63162.5431644420. The cubic root of 3989506859 is about 1586.0117678411.

The spelling of 3989506859 in words is "three billion, nine hundred eighty-nine million, five hundred six thousand, eight hundred fifty-nine".