255840743 has 2 divisors, whose sum is σ = 255840744. Its totient is φ = 255840742.

The previous prime is 255840727. The next prime is 255840797. The reversal of 255840743 is 347048552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255840743 - 2⁴ = 255840727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255840697 and 255840706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255840703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127920371 + 127920372.

It is an arithmetic number, because the mean of its divisors is an integer number (127920372).

Almost surely, 2^255840743 is an apocalyptic number.

255840743 is a deficient number, since it is larger than the sum of its proper divisors (1).

255840743 is an equidigital number, since it uses as much as digits as its factorization.

255840743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 38.

The square root of 255840743 is about 15995.0224444982. The cubic root of 255840743 is about 634.8287243443.

The spelling of 255840743 in words is "two hundred fifty-five million, eight hundred forty thousand, seven hundred forty-three".