247867 has 4 divisors (see below), whose sum is σ = 248976. Its totient is φ = 246760.

The previous prime is 247853. The next prime is 247873. The reversal of 247867 is 768742.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 247867 - 2⁷ = 247739 is a prime.

It is a super-2 number, since 2×247867² = 122876099378, 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 (247847) 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, 88 + ... + 709.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2²⁴⁷⁸⁶⁷ is an apocalyptic number.

247867 is a deficient number, since it is larger than the sum of its proper divisors (1109).

247867 is an equidigital number, since it uses as much as digits as its factorization.

247867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its digits is 18816, while the sum is 34.

The square root of 247867 is about 497.8624307979. The cubic root of 247867 is about 62.8163797592.

The spelling of 247867 in words is "two hundred forty-seven thousand, eight hundred sixty-seven".