276440993 has 2 divisors, whose sum is σ = 276440994. Its totient is φ = 276440992.

The previous prime is 276440953. The next prime is 276441073. The reversal of 276440993 is 399044672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155176849 + 121264144 = 12457^2 + 11012^2 .

It is a cyclic number.

It is not a de Polignac number, because 276440993 - 2¹⁶ = 276375457 is a prime.

It is a super-2 number, since 2×276440993² = 152839245221652098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276440903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138220496 + 138220497.

It is an arithmetic number, because the mean of its divisors is an integer number (138220497).

Almost surely, 2^276440993 is an apocalyptic number.

It is an amenable number.

276440993 is a deficient number, since it is larger than the sum of its proper divisors (1).

276440993 is an equidigital number, since it uses as much as digits as its factorization.

276440993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 276440993 is about 16626.5147580604. The cubic root of 276440993 is about 651.4295895951.

The spelling of 276440993 in words is "two hundred seventy-six million, four hundred forty thousand, nine hundred ninety-three".