247840023 has 8 divisors (see below), whose sum is σ = 339384688. Its totient is φ = 160761024.

The previous prime is 247840013. The next prime is 247840049. The reversal of 247840023 is 320048742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 247840023 - 2⁴ = 247840007 is a prime.

It is a super-2 number, since 2×247840023² = 122849354001281058, 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 (247840013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116286 + ... + 1116507.

It is an arithmetic number, because the mean of its divisors is an integer number (42423086).

Almost surely, 2^247840023 is an apocalyptic number.

247840023 is a deficient number, since it is larger than the sum of its proper divisors (91544665).

247840023 is a wasteful number, since it uses less digits than its factorization.

247840023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232833.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 247840023 is about 15742.9356538099. The cubic root of 247840023 is about 628.1410076958.

Adding to 247840023 its reverse (320048742), we get a palindrome (567888765).

The spelling of 247840023 in words is "two hundred forty-seven million, eight hundred forty thousand, twenty-three".