276313721 has 2 divisors, whose sum is σ = 276313722. Its totient is φ = 276313720.

The previous prime is 276313703. The next prime is 276313727. The reversal of 276313721 is 127313672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218005225 + 58308496 = 14765^2 + 7636^2 .

It is a cyclic number.

It is not a de Polignac number, because 276313721 - 2¹⁴ = 276297337 is a prime.

It is not a weakly prime, because it can be changed into another prime (276313727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138156860 + 138156861.

It is an arithmetic number, because the mean of its divisors is an integer number (138156861).

Almost surely, 2^276313721 is an apocalyptic number.

It is an amenable number.

276313721 is a deficient number, since it is larger than the sum of its proper divisors (1).

276313721 is an equidigital number, since it uses as much as digits as its factorization.

276313721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

The square root of 276313721 is about 16622.6869368342. The cubic root of 276313721 is about 651.3296026471.

The spelling of 276313721 in words is "two hundred seventy-six million, three hundred thirteen thousand, seven hundred twenty-one".