247306489 has 16 divisors (see below), whose sum is σ = 264297600. Its totient is φ = 230743296.

The previous prime is 247306487. The next prime is 247306517. The reversal of 247306489 is 984603742.

It is not a de Polignac number, because 247306489 - 2¹ = 247306487 is a prime.

It is a super-2 number, since 2×247306489² = 122320999003014242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247306481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491412 + ... + 491914.

It is an arithmetic number, because the mean of its divisors is an integer number (16518600).

Almost surely, 2^247306489 is an apocalyptic number.

It is an amenable number.

247306489 is a deficient number, since it is larger than the sum of its proper divisors (16991111).

247306489 is a wasteful number, since it uses less digits than its factorization.

247306489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 247306489 is about 15725.9813366289. The cubic root of 247306489 is about 627.6899433980.

The spelling of 247306489 in words is "two hundred forty-seven million, three hundred six thousand, four hundred eighty-nine".