276621047 has 2 divisors, whose sum is σ = 276621048. Its totient is φ = 276621046.

The previous prime is 276621043. The next prime is 276621049. The reversal of 276621047 is 740126672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 276621047 - 2² = 276621043 is a prime.

Together with 276621049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 276620998 and 276621016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276621043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138310523 + 138310524.

It is an arithmetic number, because the mean of its divisors is an integer number (138310524).

Almost surely, 2^276621047 is an apocalyptic number.

276621047 is a deficient number, since it is larger than the sum of its proper divisors (1).

276621047 is an equidigital number, since it uses as much as digits as its factorization.

276621047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 276621047 is about 16631.9285412125. The cubic root of 276621047 is about 651.5709905332.

The spelling of 276621047 in words is "two hundred seventy-six million, six hundred twenty-one thousand, forty-seven".