247319913 has 16 divisors (see below), whose sum is σ = 338921856. Its totient is φ = 160325760.

The previous prime is 247319911. The next prime is 247319921. The reversal of 247319913 is 319913742.

It is not a de Polignac number, because 247319913 - 2¹ = 247319911 is a prime.

It is a super-2 number, since 2×247319913² = 122334278732655138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247319911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35820 + ... + 42162.

It is an arithmetic number, because the mean of its divisors is an integer number (21182616).

Almost surely, 2^247319913 is an apocalyptic number.

It is an amenable number.

247319913 is a deficient number, since it is larger than the sum of its proper divisors (91601943).

247319913 is a wasteful number, since it uses less digits than its factorization.

247319913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704.

The product of its digits is 40824, while the sum is 39.

The square root of 247319913 is about 15726.4081404496. The cubic root of 247319913 is about 627.7013003683.

The spelling of 247319913 in words is "two hundred forty-seven million, three hundred nineteen thousand, nine hundred thirteen".