47668939 has 4 divisors (see below), whose sum is σ = 47944656. Its totient is φ = 47393224.

The previous prime is 47668931. The next prime is 47668963. The reversal of 47668939 is 93986674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93986674 = 2 ⋅46993337.

It is a cyclic number.

It is not a de Polignac number, because 47668939 - 2³ = 47668931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47668931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137599 + ... + 137944.

It is an arithmetic number, because the mean of its divisors is an integer number (11986164).

Almost surely, 2^47668939 is an apocalyptic number.

47668939 is a deficient number, since it is larger than the sum of its proper divisors (275717).

47668939 is a wasteful number, since it uses less digits than its factorization.

47668939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275716.

The product of its digits is 1959552, while the sum is 52.

The square root of 47668939 is about 6904.2696210389. The cubic root of 47668939 is about 362.5866656044.

The spelling of 47668939 in words is "forty-seven million, six hundred sixty-eight thousand, nine hundred thirty-nine".