3187981381 has 8 divisors (see below), whose sum is σ = 3440267264. Its totient is φ = 2936703600.

The previous prime is 3187981361. The next prime is 3187981387. The reversal of 3187981381 is 1831897813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3187981381 - 2²⁷ = 3053763653 is a prime.

It is a super-2 number, since 2×3187981381² = 20326450571205334322, 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 (3187981387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245445 + ... + 258106.

It is an arithmetic number, because the mean of its divisors is an integer number (430033408).

Almost surely, 2^3187981381 is an apocalyptic number.

It is an amenable number.

3187981381 is a deficient number, since it is larger than the sum of its proper divisors (252285883).

3187981381 is a wasteful number, since it uses less digits than its factorization.

3187981381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504051.

The product of its digits is 290304, while the sum is 49.

The square root of 3187981381 is about 56462.2119740274. The cubic root of 3187981381 is about 1471.7654111642.

The spelling of 3187981381 in words is "three billion, one hundred eighty-seven million, nine hundred eighty-one thousand, three hundred eighty-one".