276994447421 has 4 divisors (see below), whose sum is σ = 277239793500. Its totient is φ = 276749101344.

The previous prime is 276994447399. The next prime is 276994447427. The reversal of 276994447421 is 124744499672.

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 52768521796 + 224225925625 = 229714^2 + 473525^2 .

It is a cyclic number.

It is not a de Polignac number, because 276994447421 - 2¹⁰ = 276994446397 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 (276994447427) 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, 122671346 + ... + 122673603.

It is an arithmetic number, because the mean of its divisors is an integer number (69309948375).

Almost surely, 2^276994447421 is an apocalyptic number.

It is an amenable number.

276994447421 is a deficient number, since it is larger than the sum of its proper divisors (245346079).

276994447421 is a wasteful number, since it uses less digits than its factorization.

276994447421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245346078.

The product of its digits is 24385536, while the sum is 59.

The spelling of 276994447421 in words is "two hundred seventy-six billion, nine hundred ninety-four million, four hundred forty-seven thousand, four hundred twenty-one".