276129681 has 4 divisors (see below), whose sum is σ = 368172912. Its totient is φ = 184086452.

The previous prime is 276129673. The next prime is 276129701. The reversal of 276129681 is 186921672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 276129681 - 2³ = 276129673 is a prime.

It is a super-2 number, since 2×276129681² = 152495201458323522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (276129671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46021611 + ... + 46021616.

It is an arithmetic number, because the mean of its divisors is an integer number (92043228).

Almost surely, 2^276129681 is an apocalyptic number.

It is an amenable number.

276129681 is a deficient number, since it is larger than the sum of its proper divisors (92043231).

276129681 is an equidigital number, since it uses as much as digits as its factorization.

276129681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92043230.

The product of its digits is 72576, while the sum is 42.

The square root of 276129681 is about 16617.1502069398. The cubic root of 276129681 is about 651.1849635234.

The spelling of 276129681 in words is "two hundred seventy-six million, one hundred twenty-nine thousand, six hundred eighty-one".