245784613 has 2 divisors, whose sum is σ = 245784614. Its totient is φ = 245784612.

The previous prime is 245784607. The next prime is 245784631. The reversal of 245784613 is 316487542.

Together with next prime (245784631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193265604 + 52519009 = 13902^2 + 7247^2 .

It is a cyclic number.

It is not a de Polignac number, because 245784613 - 2²⁵ = 212230181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245784653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122892306 + 122892307.

It is an arithmetic number, because the mean of its divisors is an integer number (122892307).

Almost surely, 2^245784613 is an apocalyptic number.

It is an amenable number.

245784613 is a deficient number, since it is larger than the sum of its proper divisors (1).

245784613 is an equidigital number, since it uses as much as digits as its factorization.

245784613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 245784613 is about 15677.5193509688. The cubic root of 245784613 is about 626.3997326176.

The spelling of 245784613 in words is "two hundred forty-five million, seven hundred eighty-four thousand, six hundred thirteen".