247932239 has 4 divisors (see below), whose sum is σ = 249217056. Its totient is φ = 246647424.

The previous prime is 247932211. The next prime is 247932253. The reversal of 247932239 is 932239742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 247932239 - 2¹² = 247928143 is a prime.

It is a super-2 number, since 2×247932239² = 122940790271106242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247932196 and 247932205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247932259) 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, 642119 + ... + 642504.

It is an arithmetic number, because the mean of its divisors is an integer number (62304264).

Almost surely, 2^247932239 is an apocalyptic number.

247932239 is a deficient number, since it is larger than the sum of its proper divisors (1284817).

247932239 is a wasteful number, since it uses less digits than its factorization.

247932239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284816.

The product of its digits is 163296, while the sum is 41.

The square root of 247932239 is about 15745.8641871445. The cubic root of 247932239 is about 628.2189040040.

The spelling of 247932239 in words is "two hundred forty-seven million, nine hundred thirty-two thousand, two hundred thirty-nine".