276667421 has 4 divisors (see below), whose sum is σ = 276929244. Its totient is φ = 276405600.

The previous prime is 276667411. The next prime is 276667429. The reversal of 276667421 is 124766672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70744921 + 205922500 = 8411^2 + 14350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-276667421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276667429) 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, 129320 + ... + 131441.

It is an arithmetic number, because the mean of its divisors is an integer number (69232311).

Almost surely, 2^276667421 is an apocalyptic number.

It is an amenable number.

276667421 is a deficient number, since it is larger than the sum of its proper divisors (261823).

276667421 is a wasteful number, since it uses less digits than its factorization.

276667421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261822.

The product of its digits is 169344, while the sum is 41.

The square root of 276667421 is about 16633.3226085470. The cubic root of 276667421 is about 651.6073992653.

The spelling of 276667421 in words is "two hundred seventy-six million, six hundred sixty-seven thousand, four hundred twenty-one".