276434921 has 6 divisors (see below), whose sum is σ = 321567210. Its totient is φ = 236944176.

The previous prime is 276434911. The next prime is 276434923. The reversal of 276434921 is 129434672.

It can be written as a sum of positive squares in only one way, i.e., 248503696 + 27931225 = 15764^2 + 5285^2 .

It is a de Polignac number, because none of the positive numbers 2^k-276434921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (276434923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2820716 + ... + 2820813.

It is an arithmetic number, because the mean of its divisors is an integer number (53594535).

Almost surely, 2^276434921 is an apocalyptic number.

It is an amenable number.

276434921 is a deficient number, since it is larger than the sum of its proper divisors (45132289).

276434921 is an equidigital number, since it uses as much as digits as its factorization.

276434921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641543 (or 5641536 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 276434921 is about 16626.3321571536. The cubic root of 276434921 is about 651.4248200306.

The spelling of 276434921 in words is "two hundred seventy-six million, four hundred thirty-four thousand, nine hundred twenty-one".