47123209 has 8 divisors (see below), whose sum is σ = 53898048. Its totient is φ = 40359120.

The previous prime is 47123203. The next prime is 47123213. The reversal of 47123209 is 90232174.

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 47123209 - 2¹⁵ = 47090441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47123203) 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, 12294 + ... + 15664.

It is an arithmetic number, because the mean of its divisors is an integer number (6737256).

Almost surely, 2^47123209 is an apocalyptic number.

It is an amenable number.

47123209 is a deficient number, since it is larger than the sum of its proper divisors (6774839).

47123209 is a wasteful number, since it uses less digits than its factorization.

47123209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 47123209 is about 6864.6346588875. The cubic root of 47123209 is about 361.1976802699.

It can be divided in two parts, 4712 and 3209, that added together give a square (7921 = 89²).

The spelling of 47123209 in words is "forty-seven million, one hundred twenty-three thousand, two hundred nine".