47209069 has 4 divisors (see below), whose sum is σ = 47225596. Its totient is φ = 47192544.

The previous prime is 47209067. The next prime is 47209073. The reversal of 47209069 is 96090274.

47209069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6734025 + 40475044 = 2595^2 + 6362^2 .

It is a cyclic number.

It is not a de Polignac number, because 47209069 - 2¹ = 47209067 is a prime.

It is a super-2 number, since 2×47209069² = 4457392391693522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47209067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2754 + ... + 10099.

It is an arithmetic number, because the mean of its divisors is an integer number (11806399).

Almost surely, 2^47209069 is an apocalyptic number.

47209069 is the 3673-rd nonagonal number.

It is an amenable number.

47209069 is a deficient number, since it is larger than the sum of its proper divisors (16527).

47209069 is a wasteful number, since it uses less digits than its factorization.

47209069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 47209069 is about 6870.8856052186. The cubic root of 47209069 is about 361.4169184281.

The spelling of 47209069 in words is "forty-seven million, two hundred nine thousand, sixty-nine".