276742397 has 2 divisors, whose sum is σ = 276742398. Its totient is φ = 276742396.

The previous prime is 276742379. The next prime is 276742399. The reversal of 276742397 is 793247672.

Together with previous prime (276742379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276689956 + 52441 = 16634^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 276742397 - 2²² = 272548093 is a prime.

Together with 276742399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276742399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138371198 + 138371199.

It is an arithmetic number, because the mean of its divisors is an integer number (138371199).

Almost surely, 2^276742397 is an apocalyptic number.

It is an amenable number.

276742397 is a deficient number, since it is larger than the sum of its proper divisors (1).

276742397 is an equidigital number, since it uses as much as digits as its factorization.

276742397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 47.

The square root of 276742397 is about 16635.5762449036. The cubic root of 276742397 is about 651.6662551335. Note that the first 3 decimals are identical.

The spelling of 276742397 in words is "two hundred seventy-six million, seven hundred forty-two thousand, three hundred ninety-seven".