276821423 has 2 divisors, whose sum is σ = 276821424. Its totient is φ = 276821422.

The previous prime is 276821357. The next prime is 276821429. The reversal of 276821423 is 324128672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 276821423 - 2¹⁶ = 276755887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276821429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138410711 + 138410712.

It is an arithmetic number, because the mean of its divisors is an integer number (138410712).

Almost surely, 2^276821423 is an apocalyptic number.

276821423 is a deficient number, since it is larger than the sum of its proper divisors (1).

276821423 is an equidigital number, since it uses as much as digits as its factorization.

276821423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 276821423 is about 16637.9512861410. The cubic root of 276821423 is about 651.7282787301.

The spelling of 276821423 in words is "two hundred seventy-six million, eight hundred twenty-one thousand, four hundred twenty-three".