4261247989 has 4 divisors (see below), whose sum is σ = 4261378624. Its totient is φ = 4261117356.

The previous prime is 4261247959. The next prime is 4261247993. The reversal of 4261247989 is 9897421624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4261247989 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 (4261247959) 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, 29284 + ... + 96850.

It is an arithmetic number, because the mean of its divisors is an integer number (1065344656).

Almost surely, 2^4261247989 is an apocalyptic number.

It is an amenable number.

4261247989 is a deficient number, since it is larger than the sum of its proper divisors (130635).

4261247989 is an equidigital number, since it uses as much as digits as its factorization.

4261247989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130634.

The product of its digits is 1741824, while the sum is 52.

The square root of 4261247989 is about 65278.2351860097. The cubic root of 4261247989 is about 1621.2336268612.

It can be divided in two parts, 42612 and 47989, that added together give a square (90601 = 301²).

The spelling of 4261247989 in words is "four billion, two hundred sixty-one million, two hundred forty-seven thousand, nine hundred eighty-nine".