862743449 has 2 divisors, whose sum is σ = 862743450. Its totient is φ = 862743448.

The previous prime is 862743439. The next prime is 862743457. The reversal of 862743449 is 944347268.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520752400 + 341991049 = 22820^2 + 18493^2 .

It is a cyclic number.

It is not a de Polignac number, because 862743449 - 2¹⁶ = 862677913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (862743439) 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, 431371724 + 431371725.

It is an arithmetic number, because the mean of its divisors is an integer number (431371725).

Almost surely, 2^862743449 is an apocalyptic number.

It is an amenable number.

862743449 is a deficient number, since it is larger than the sum of its proper divisors (1).

862743449 is an equidigital number, since it uses as much as digits as its factorization.

862743449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 47.

The square root of 862743449 is about 29372.4947697672. The cubic root of 862743449 is about 951.9786825400.

The spelling of 862743449 in words is "eight hundred sixty-two million, seven hundred forty-three thousand, four hundred forty-nine".