3981706319 has 4 divisors (see below), whose sum is σ = 3983173440. Its totient is φ = 3980239200.

The previous prime is 3981706283. The next prime is 3981706331. The reversal of 3981706319 is 9136071893.

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 3981706319 - 2²⁴ = 3964929103 is a prime.

It is a super-2 number, since 2×3981706319² = 31707970421529059522, 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 (3981706219) 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, 729482 + ... + 734919.

It is an arithmetic number, because the mean of its divisors is an integer number (995793360).

Almost surely, 2^3981706319 is an apocalyptic number.

3981706319 is a deficient number, since it is larger than the sum of its proper divisors (1467121).

3981706319 is a wasteful number, since it uses less digits than its factorization.

3981706319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467120.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 3981706319 is about 63100.7632204239. The cubic root of 3981706319 is about 1584.9774027103.

The spelling of 3981706319 in words is "three billion, nine hundred eighty-one million, seven hundred six thousand, three hundred nineteen".