2447428709 has 4 divisors (see below), whose sum is σ = 2669922240. Its totient is φ = 2224935180.

The previous prime is 2447428699. The next prime is 2447428757. The reversal of 2447428709 is 9078247442.

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.

It is a cyclic number.

It is not a de Polignac number, because 2447428709 - 2¹² = 2447424613 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 (2447428309) 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, 111246749 + ... + 111246770.

It is an arithmetic number, because the mean of its divisors is an integer number (667480560).

Almost surely, 2^2447428709 is an apocalyptic number.

It is an amenable number.

2447428709 is a deficient number, since it is larger than the sum of its proper divisors (222493531).

2447428709 is a wasteful number, since it uses less digits than its factorization.

2447428709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222493530.

The product of its (nonzero) digits is 903168, while the sum is 47.

The square root of 2447428709 is about 49471.4939030549. The cubic root of 2447428709 is about 1347.6279716408.

The spelling of 2447428709 in words is "two billion, four hundred forty-seven million, four hundred twenty-eight thousand, seven hundred nine".