2947439709 has 12 divisors (see below), whose sum is σ = 4273982076. Its totient is φ = 1957312512.

The previous prime is 2947439707. The next prime is 2947439711. The reversal of 2947439709 is 9079347492.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2947439707) and next prime (2947439711).

It can be written as a sum of positive squares in 2 ways, for example, as 2400020100 + 547419609 = 48990^2 + 23397^2 .

It is not a de Polignac number, because 2947439709 - 2¹ = 2947439707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2947439707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634834 + ... + 639459.

It is an arithmetic number, because the mean of its divisors is an integer number (356165173).

Almost surely, 2^2947439709 is an apocalyptic number.

It is an amenable number.

2947439709 is a deficient number, since it is larger than the sum of its proper divisors (1326542367).

2947439709 is a wasteful number, since it uses less digits than its factorization.

2947439709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274556 (or 1274553 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 2947439709 is about 54290.3279507501. The cubic root of 2947439709 is about 1433.7771124086. Note that the first 3 decimals are identical.

The spelling of 2947439709 in words is "two billion, nine hundred forty-seven million, four hundred thirty-nine thousand, seven hundred nine".