247716489 has 8 divisors (see below), whose sum is σ = 332134560. Its totient is φ = 164221376.

The previous prime is 247716481. The next prime is 247716533. The reversal of 247716489 is 984617742.

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

It is a cyclic number.

It is not a de Polignac number, because 247716489 - 2³ = 247716481 is a prime.

It is a super-2 number, since 2×247716489² = 122726917844974242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247716481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230112 + ... + 231185.

It is an arithmetic number, because the mean of its divisors is an integer number (41516820).

Almost surely, 2^247716489 is an apocalyptic number.

It is an amenable number.

247716489 is a deficient number, since it is larger than the sum of its proper divisors (84418071).

247716489 is a wasteful number, since it uses less digits than its factorization.

247716489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461479.

The product of its digits is 677376, while the sum is 48.

The square root of 247716489 is about 15739.0116907003. The cubic root of 247716489 is about 628.0366262937.

The spelling of 247716489 in words is "two hundred forty-seven million, seven hundred sixteen thousand, four hundred eighty-nine".