247863 has 32 divisors (see below), whose sum is σ = 437760. Its totient is φ = 120960.

The previous prime is 247853. The next prime is 247873. The reversal of 247863 is 368742.

Added to its reverse (368742) it gives a triangular number (616605 = T₁₁₁₀).

It is an interprime number because it is at equal distance from previous prime (247853) and next prime (247873).

It is not a de Polignac number, because 247863 - 2⁴ = 247847 is a prime.

It is a super-2 number, since 2×247863² = 122872133538, which contains 22 as substring.

247863 is a lucky number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 247863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6681 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (13680).

2²⁴⁷⁸⁶³ is an apocalyptic number.

247863 is a deficient number, since it is larger than the sum of its proper divisors (189897).

247863 is a wasteful number, since it uses less digits than its factorization.

247863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87.

The product of its digits is 8064, while the sum is 30.

The square root of 247863 is about 497.8584136077. The cubic root of 247863 is about 62.8160418537.

Adding to 247863 its reverse (368742), we get a triangular number (616605 = T₁₁₁₀).

It can be divided in two parts, 24 and 7863, that added together give a palindrome (7887).

The spelling of 247863 in words is "two hundred forty-seven thousand, eight hundred sixty-three".