4247684991 has 24 divisors (see below), whose sum is σ = 7087049424. Its totient is φ = 2422920960.

The previous prime is 4247684977. The next prime is 4247685017. The reversal of 4247684991 is 1994867424.

4247684991 is a `hidden beast` number, since 4 + 2 + 476 + 84 + 9 + 91 = 666.

It is not a de Polignac number, because 4247684991 - 2⁶ = 4247684927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4247684921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1260256 + ... + 1263621.

It is an arithmetic number, because the mean of its divisors is an integer number (295293726).

Almost surely, 2^4247684991 is an apocalyptic number.

4247684991 is a deficient number, since it is larger than the sum of its proper divisors (2839364433).

4247684991 is a wasteful number, since it uses less digits than its factorization.

4247684991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523911 (or 2523908 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 4247684991 is about 65174.2663249844. The cubic root of 4247684991 is about 1619.5117401442.

The spelling of 4247684991 in words is "four billion, two hundred forty-seven million, six hundred eighty-four thousand, nine hundred ninety-one".