276681397 has 4 divisors (see below), whose sum is σ = 276715980. Its totient is φ = 276646816.

The previous prime is 276681389. The next prime is 276681403. The reversal of 276681397 is 793186672.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 246144721 + 30536676 = 15689^2 + 5526^2 .

It is a cyclic number.

It is not a de Polignac number, because 276681397 - 2³ = 276681389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 276681397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276681337) 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, 1563 + ... + 23575.

It is an arithmetic number, because the mean of its divisors is an integer number (69178995).

Almost surely, 2^276681397 is an apocalyptic number.

It is an amenable number.

276681397 is a deficient number, since it is larger than the sum of its proper divisors (34583).

276681397 is a wasteful number, since it uses less digits than its factorization.

276681397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34582.

The product of its digits is 762048, while the sum is 49.

The square root of 276681397 is about 16633.7427237528. The cubic root of 276681397 is about 651.6183711771.

The spelling of 276681397 in words is "two hundred seventy-six million, six hundred eighty-one thousand, three hundred ninety-seven".