47809479 has 16 divisors (see below), whose sum is σ = 66684672. Its totient is φ = 30410688.

The previous prime is 47809477. The next prime is 47809493. The reversal of 47809479 is 97490874.

It is a happy number.

It is not a de Polignac number, because 47809479 - 2¹ = 47809477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47809477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42012 + ... + 43134.

It is an arithmetic number, because the mean of its divisors is an integer number (4167792).

Almost surely, 2^47809479 is an apocalyptic number.

47809479 is a deficient number, since it is larger than the sum of its proper divisors (18875193).

47809479 is a wasteful number, since it uses less digits than its factorization.

47809479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 47809479 is about 6914.4398905479. The cubic root of 47809479 is about 362.9426481651.

The spelling of 47809479 in words is "forty-seven million, eight hundred nine thousand, four hundred seventy-nine".