245243543 has 2 divisors, whose sum is σ = 245243544. Its totient is φ = 245243542.

The previous prime is 245243539. The next prime is 245243567. The reversal of 245243543 is 345342542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245243543 - 2² = 245243539 is a prime.

It is a Sophie Germain prime.

It is equal to p_13433288 and since 245243543 and 13433288 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245243533) 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, 122621771 + 122621772.

It is an arithmetic number, because the mean of its divisors is an integer number (122621772).

Almost surely, 2^245243543 is an apocalyptic number.

245243543 is a deficient number, since it is larger than the sum of its proper divisors (1).

245243543 is an equidigital number, since it uses as much as digits as its factorization.

245243543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 32.

The square root of 245243543 is about 15660.2536058648. The cubic root of 245243543 is about 625.9397429981.

The spelling of 245243543 in words is "two hundred forty-five million, two hundred forty-three thousand, five hundred forty-three".