245413549 has 2 divisors, whose sum is σ = 245413550. Its totient is φ = 245413548.

The previous prime is 245413543. The next prime is 245413591. The reversal of 245413549 is 945314542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164737225 + 80676324 = 12835^2 + 8982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245413549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245413543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122706774 + 122706775.

It is an arithmetic number, because the mean of its divisors is an integer number (122706775).

Almost surely, 2^245413549 is an apocalyptic number.

It is an amenable number.

245413549 is a deficient number, since it is larger than the sum of its proper divisors (1).

245413549 is an equidigital number, since it uses as much as digits as its factorization.

245413549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 37.

The square root of 245413549 is about 15665.6806108129. The cubic root of 245413549 is about 626.0843461017.

The spelling of 245413549 in words is "two hundred forty-five million, four hundred thirteen thousand, five hundred forty-nine".