2947409 has 8 divisors (see below), whose sum is σ = 3136968. Its totient is φ = 2759680.

The previous prime is 2947403. The next prime is 2947429. The reversal of 2947409 is 9047492.

It can be written as a sum of positive squares in 4 ways, for example, as 297025 + 2650384 = 545^2 + 1628^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2947409 - 2¹⁶ = 2881873 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2947403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4469 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (392121).

2^2947409 is an apocalyptic number.

It is an amenable number.

2947409 is a deficient number, since it is larger than the sum of its proper divisors (189559).

2947409 is a wasteful number, since it uses less digits than its factorization.

2947409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 2947409 is about 1716.8019687780. The cubic root of 2947409 is about 143.3772132944.

The spelling of 2947409 in words is "two million, nine hundred forty-seven thousand, four hundred nine".