402784243 has 2 divisors, whose sum is σ = 402784244. Its totient is φ = 402784242.

The previous prime is 402784223. The next prime is 402784253. The reversal of 402784243 is 342487204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402784243 - 2¹⁷ = 402653171 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 402784199 and 402784208.

It is not a weakly prime, because it can be changed into another prime (402784223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201392121 + 201392122.

It is an arithmetic number, because the mean of its divisors is an integer number (201392122).

Almost surely, 2^402784243 is an apocalyptic number.

402784243 is a deficient number, since it is larger than the sum of its proper divisors (1).

402784243 is an equidigital number, since it uses as much as digits as its factorization.

402784243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 402784243 is about 20069.4853695853. The cubic root of 402784243 is about 738.5118883357.

It can be divided in two parts, 40278 and 4243, that added together give a square (44521 = 211²).

The spelling of 402784243 in words is "four hundred two million, seven hundred eighty-four thousand, two hundred forty-three".