4247475991 has 4 divisors (see below), whose sum is σ = 4633610184. Its totient is φ = 3861341800.

The previous prime is 4247475931. The next prime is 4247475997. The reversal of 4247475991 is 1995747424.

It is a happy number.

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 4247475991 - 2¹¹ = 4247473943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4247475997) 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, 193067080 + ... + 193067101.

It is an arithmetic number, because the mean of its divisors is an integer number (1158402546).

Almost surely, 2^4247475991 is an apocalyptic number.

4247475991 is a deficient number, since it is larger than the sum of its proper divisors (386134193).

4247475991 is a wasteful number, since it uses less digits than its factorization.

4247475991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386134192.

The product of its digits is 2540160, while the sum is 52.

The square root of 4247475991 is about 65172.6629116841. The cubic root of 4247475991 is about 1619.4851779497.

The spelling of 4247475991 in words is "four billion, two hundred forty-seven million, four hundred seventy-five thousand, nine hundred ninety-one".