245453993 has 2 divisors, whose sum is σ = 245453994. Its totient is φ = 245453992.

The previous prime is 245453987. The next prime is 245454017. The reversal of 245453993 is 399354542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211208089 + 34245904 = 14533^2 + 5852^2 .

It is a cyclic number.

It is not a de Polignac number, because 245453993 - 2⁸ = 245453737 is a prime.

It is not a weakly prime, because it can be changed into another prime (245455993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122726996 + 122726997.

It is an arithmetic number, because the mean of its divisors is an integer number (122726997).

Almost surely, 2^245453993 is an apocalyptic number.

It is an amenable number.

245453993 is a deficient number, since it is larger than the sum of its proper divisors (1).

245453993 is an equidigital number, since it uses as much as digits as its factorization.

245453993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 245453993 is about 15666.9714048376. The cubic root of 245453993 is about 626.1187369826.

The spelling of 245453993 in words is "two hundred forty-five million, four hundred fifty-three thousand, nine hundred ninety-three".