276420143 has 2 divisors, whose sum is σ = 276420144. Its totient is φ = 276420142.

The previous prime is 276420139. The next prime is 276420161. The reversal of 276420143 is 341024672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 276420143 - 2² = 276420139 is a prime.

It is a super-2 number, since 2×276420143² = 152816190912280898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276420103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138210071 + 138210072.

It is an arithmetic number, because the mean of its divisors is an integer number (138210072).

Almost surely, 2^276420143 is an apocalyptic number.

276420143 is a deficient number, since it is larger than the sum of its proper divisors (1).

276420143 is an equidigital number, since it uses as much as digits as its factorization.

276420143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 276420143 is about 16625.8877356970. The cubic root of 276420143 is about 651.4132115991.

The spelling of 276420143 in words is "two hundred seventy-six million, four hundred twenty thousand, one hundred forty-three".