245621743 has 2 divisors, whose sum is σ = 245621744. Its totient is φ = 245621742.

The previous prime is 245621741. The next prime is 245621771. The reversal of 245621743 is 347126542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245621743 - 2¹ = 245621741 is a prime.

Together with 245621741, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 245621699 and 245621708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245621741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122810871 + 122810872.

It is an arithmetic number, because the mean of its divisors is an integer number (122810872).

Almost surely, 2^245621743 is an apocalyptic number.

245621743 is a deficient number, since it is larger than the sum of its proper divisors (1).

245621743 is an equidigital number, since it uses as much as digits as its factorization.

245621743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 245621743 is about 15672.3241097165. The cubic root of 245621743 is about 626.2613400815.

The spelling of 245621743 in words is "two hundred forty-five million, six hundred twenty-one thousand, seven hundred forty-three".