247929 has 12 divisors (see below), whose sum is σ = 363888. Its totient is φ = 150040.

The previous prime is 247913. The next prime is 247939. The reversal of 247929 is 929742.

It is not a de Polignac number, because 247929 - 2⁴ = 247913 is a prime.

It is a super-2 number, since 2×247929² = 122937578082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 247929.

It is not an unprimeable number, because it can be changed into a prime (247939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22 + ... + 704.

It is an arithmetic number, because the mean of its divisors is an integer number (30324).

2²⁴⁷⁹²⁹ is an apocalyptic number.

It is an amenable number.

247929 is a deficient number, since it is larger than the sum of its proper divisors (115959).

247929 is a wasteful number, since it uses less digits than its factorization.

247929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 697 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 247929 is about 497.9246931013. The cubic root of 247929 is about 62.8216168297.

It can be divided in two parts, 247 and 929, that added together give a triangular number (1176 = T₄₈).

The spelling of 247929 in words is "two hundred forty-seven thousand, nine hundred twenty-nine".