3187879381 has 2 divisors, whose sum is σ = 3187879382. Its totient is φ = 3187879380.

The previous prime is 3187879379. The next prime is 3187879391. The reversal of 3187879381 is 1839787813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3028741156 + 159138225 = 55034^2 + 12615^2 .

It is an emirp because it is prime and its reverse (1839787813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3187879381 - 2¹ = 3187879379 is a prime.

It is a super-2 number, since 2×3187879381² = 20325149895609886322, which contains 22 as substring.

Together with 3187879379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3187879391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593939690 + 1593939691.

It is an arithmetic number, because the mean of its divisors is an integer number (1593939691).

Almost surely, 2^3187879381 is an apocalyptic number.

It is an amenable number.

3187879381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3187879381 is an equidigital number, since it uses as much as digits as its factorization.

3187879381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 55.

The square root of 3187879381 is about 56461.3087078222. The cubic root of 3187879381 is about 1471.7497145362.

The spelling of 3187879381 in words is "three billion, one hundred eighty-seven million, eight hundred seventy-nine thousand, three hundred eighty-one".