3187483781 has 2 divisors, whose sum is σ = 3187483782. Its totient is φ = 3187483780.

The previous prime is 3187483769. The next prime is 3187483801. The reversal of 3187483781 is 1873847813.

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., 3084136225 + 103347556 = 55535^2 + 10166^2 .

It is a cyclic number.

It is not a de Polignac number, because 3187483781 - 2²² = 3183289477 is a prime.

It is a super-2 number, since 2×3187483781² = 20320105708276111922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3187483711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593741890 + 1593741891.

It is an arithmetic number, because the mean of its divisors is an integer number (1593741891).

Almost surely, 2^3187483781 is an apocalyptic number.

It is an amenable number.

3187483781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3187483781 is an equidigital number, since it uses as much as digits as its factorization.

3187483781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 50.

The square root of 3187483781 is about 56457.8053151201. The cubic root of 3187483781 is about 1471.6888330742.

The spelling of 3187483781 in words is "three billion, one hundred eighty-seven million, four hundred eighty-three thousand, seven hundred eighty-one".