3978551239 has 4 divisors (see below), whose sum is σ = 4284593656. Its totient is φ = 3672508824.

The previous prime is 3978551183. The next prime is 3978551249. The reversal of 3978551239 is 9321558793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9321558793 = 3517 ⋅2650429.

It is a cyclic number.

It is not a de Polignac number, because 3978551239 - 2¹¹ = 3978549191 is a prime.

It is a super-2 number, since 2×3978551239² = 31657739922696870242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978551249) 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, 153021189 + ... + 153021214.

It is an arithmetic number, because the mean of its divisors is an integer number (1071148414).

Almost surely, 2^3978551239 is an apocalyptic number.

3978551239 is a deficient number, since it is larger than the sum of its proper divisors (306042417).

3978551239 is a wasteful number, since it uses less digits than its factorization.

3978551239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306042416.

The product of its digits is 2041200, while the sum is 52.

The square root of 3978551239 is about 63075.7579344077. The cubic root of 3978551239 is about 1584.5586499166.

The spelling of 3978551239 in words is "three billion, nine hundred seventy-eight million, five hundred fifty-one thousand, two hundred thirty-nine".