245584649 has 2 divisors, whose sum is σ = 245584650. Its totient is φ = 245584648.

The previous prime is 245584643. The next prime is 245584663. The reversal of 245584649 is 946485542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242362624 + 3222025 = 15568^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 245584649 - 2⁸ = 245584393 is a prime.

It is not a weakly prime, because it can be changed into another prime (245584643) 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, 122792324 + 122792325.

It is an arithmetic number, because the mean of its divisors is an integer number (122792325).

Almost surely, 2^245584649 is an apocalyptic number.

It is an amenable number.

245584649 is a deficient number, since it is larger than the sum of its proper divisors (1).

245584649 is an equidigital number, since it uses as much as digits as its factorization.

245584649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 47.

The square root of 245584649 is about 15671.1406413190. The cubic root of 245584649 is about 626.2298123248.

The spelling of 245584649 in words is "two hundred forty-five million, five hundred eighty-four thousand, six hundred forty-nine".