276491731 has 2 divisors, whose sum is σ = 276491732. Its totient is φ = 276491730.

The previous prime is 276491707. The next prime is 276491749. The reversal of 276491731 is 137194672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 276491731 - 2¹³ = 276483539 is a prime.

It is a super-2 number, since 2×276491731² = 152895354622752722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276491431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138245865 + 138245866.

It is an arithmetic number, because the mean of its divisors is an integer number (138245866).

Almost surely, 2^276491731 is an apocalyptic number.

276491731 is a deficient number, since it is larger than the sum of its proper divisors (1).

276491731 is an equidigital number, since it uses as much as digits as its factorization.

276491731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 276491731 is about 16628.0405039199. The cubic root of 276491731 is about 651.4694416352.

The spelling of 276491731 in words is "two hundred seventy-six million, four hundred ninety-one thousand, seven hundred thirty-one".