47289409 has 4 divisors (see below), whose sum is σ = 48181716. Its totient is φ = 46397104.

The previous prime is 47289391. The next prime is 47289419. The reversal of 47289409 is 90498274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32490000 + 14799409 = 5700^2 + 3847^2 .

It is a cyclic number.

It is not a de Polignac number, because 47289409 - 2¹⁷ = 47158337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47289419) 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, 446074 + ... + 446179.

It is an arithmetic number, because the mean of its divisors is an integer number (12045429).

Almost surely, 2^47289409 is an apocalyptic number.

It is an amenable number.

47289409 is a deficient number, since it is larger than the sum of its proper divisors (892307).

47289409 is an equidigital number, since it uses as much as digits as its factorization.

47289409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892306.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 47289409 is about 6876.7295279079. The cubic root of 47289409 is about 361.6218210043.

The spelling of 47289409 in words is "forty-seven million, two hundred eighty-nine thousand, four hundred nine".