245021593 has 2 divisors, whose sum is σ = 245021594. Its totient is φ = 245021592.

The previous prime is 245021591. The next prime is 245021627. The reversal of 245021593 is 395120542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245016409 + 5184 = 15653^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 245021593 - 2¹ = 245021591 is a prime.

Together with 245021591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (245021591) 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, 122510796 + 122510797.

It is an arithmetic number, because the mean of its divisors is an integer number (122510797).

Almost surely, 2^245021593 is an apocalyptic number.

It is an amenable number.

245021593 is a deficient number, since it is larger than the sum of its proper divisors (1).

245021593 is an equidigital number, since it uses as much as digits as its factorization.

245021593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 245021593 is about 15653.1655903846. The cubic root of 245021593 is about 625.7508569409.

The spelling of 245021593 in words is "two hundred forty-five million, twenty-one thousand, five hundred ninety-three".