247319 has 4 divisors (see below), whose sum is σ = 258096. Its totient is φ = 236544.

The previous prime is 247309. The next prime is 247337. The reversal of 247319 is 913742.

247319 = T₁₃₅ + T₁₃₆ + ... + T₁₅₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 913742 = 2 ⋅456871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247319 is a prime.

It is a super-2 number, since 2×247319² = 122333375522, 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 (247309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5354 + ... + 5399.

It is an arithmetic number, because the mean of its divisors is an integer number (64524).

2²⁴⁷³¹⁹ is an apocalyptic number.

247319 is a deficient number, since it is larger than the sum of its proper divisors (10777).

247319 is a wasteful number, since it uses less digits than its factorization.

247319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10776.

The product of its digits is 1512, while the sum is 26.

The square root of 247319 is about 497.3117734380. The cubic root of 247319 is about 62.7700527965.

The spelling of 247319 in words is "two hundred forty-seven thousand, three hundred nineteen".