276430493 has 2 divisors, whose sum is σ = 276430494. Its totient is φ = 276430492.

The previous prime is 276430463. The next prime is 276430519. The reversal of 276430493 is 394034672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275659609 + 770884 = 16603^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 276430493 - 2²⁰ = 275381917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276430403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138215246 + 138215247.

It is an arithmetic number, because the mean of its divisors is an integer number (138215247).

Almost surely, 2^276430493 is an apocalyptic number.

It is an amenable number.

276430493 is a deficient number, since it is larger than the sum of its proper divisors (1).

276430493 is an equidigital number, since it uses as much as digits as its factorization.

276430493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 276430493 is about 16626.1989943583. The cubic root of 276430493 is about 651.4213417864.

The spelling of 276430493 in words is "two hundred seventy-six million, four hundred thirty thousand, four hundred ninety-three".