4247408249 has 6 divisors (see below), whose sum is σ = 4940862714. Its totient is φ = 3640635600.

The previous prime is 4247408227. The next prime is 4247408261. The reversal of 4247408249 is 9428047424.

It can be written as a sum of positive squares in only one way, i.e., 3374796649 + 872611600 = 58093^2 + 29540^2 .

It is not a de Polignac number, because 4247408249 - 2²⁰ = 4246359673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4247408279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43340852 + ... + 43340949.

It is an arithmetic number, because the mean of its divisors is an integer number (823477119).

Almost surely, 2^4247408249 is an apocalyptic number.

4247408249 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4247408249 is a deficient number, since it is larger than the sum of its proper divisors (693454465).

4247408249 is an equidigital number, since it uses as much as digits as its factorization.

4247408249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86681815 (or 86681808 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The square root of 4247408249 is about 65172.1431978418. The cubic root of 4247408249 is about 1619.4765683073.

The spelling of 4247408249 in words is "four billion, two hundred forty-seven million, four hundred eight thousand, two hundred forty-nine".