247499813 has 12 divisors (see below), whose sum is σ = 272635104. Its totient is φ = 224512200.

The previous prime is 247499807. The next prime is 247499827. The reversal of 247499813 is 318994742.

It is not a de Polignac number, because 247499813 - 2¹⁴ = 247483429 is a prime.

It is a super-2 number, since 2×247499813² = 122512314870069938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247499713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61328 + ... + 65238.

It is an arithmetic number, because the mean of its divisors is an integer number (22719592).

Almost surely, 2^247499813 is an apocalyptic number.

It is an amenable number.

247499813 is a deficient number, since it is larger than the sum of its proper divisors (25135291).

247499813 is a wasteful number, since it uses less digits than its factorization.

247499813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456 (or 4445 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 247499813 is about 15732.1267793010. The cubic root of 247499813 is about 627.8534596958.

The spelling of 247499813 in words is "two hundred forty-seven million, four hundred ninety-nine thousand, eight hundred thirteen".