3143447981 has 2 divisors, whose sum is σ = 3143447982. Its totient is φ = 3143447980.

The previous prime is 3143447959. The next prime is 3143448001. The reversal of 3143447981 is 1897443413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2526670756 + 616777225 = 50266^2 + 24835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3143447981 is a prime.

It is a super-2 number, since 2×3143447981² = 19762530418505952722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3143447921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1571723990 + 1571723991.

It is an arithmetic number, because the mean of its divisors is an integer number (1571723991).

Almost surely, 2^3143447981 is an apocalyptic number.

It is an amenable number.

3143447981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3143447981 is an equidigital number, since it uses as much as digits as its factorization.

3143447981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 3143447981 is about 56066.4603930014. The cubic root of 3143447981 is about 1464.8801450402.

The spelling of 3143447981 in words is "three billion, one hundred forty-three million, four hundred forty-seven thousand, nine hundred eighty-one".