47687879 has 4 divisors (see below), whose sum is σ = 48851040. Its totient is φ = 46524720.

The previous prime is 47687851. The next prime is 47687917. The reversal of 47687879 is 97878674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97878674 = 2 ⋅48939337.

It is a cyclic number.

It is not a de Polignac number, because 47687879 - 2¹⁶ = 47622343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47687279) 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, 581519 + ... + 581600.

It is an arithmetic number, because the mean of its divisors is an integer number (12212760).

Almost surely, 2^47687879 is an apocalyptic number.

47687879 is a deficient number, since it is larger than the sum of its proper divisors (1163161).

47687879 is a wasteful number, since it uses less digits than its factorization.

47687879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163160.

The product of its digits is 4741632, while the sum is 56.

The square root of 47687879 is about 6905.6410998545. The cubic root of 47687879 is about 362.6346806729.

The spelling of 47687879 in words is "forty-seven million, six hundred eighty-seven thousand, eight hundred seventy-nine".