47679691 has 4 divisors (see below), whose sum is σ = 47749384. Its totient is φ = 47610000.

The previous prime is 47679689. The next prime is 47679707. The reversal of 47679691 is 19697674.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(47679691) divides (47679691-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 47679691 - 2¹ = 47679689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47679601) 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, 33810 + ... + 35191.

It is an arithmetic number, because the mean of its divisors is an integer number (11937346).

Almost surely, 2^47679691 is an apocalyptic number.

47679691 is a deficient number, since it is larger than the sum of its proper divisors (69693).

47679691 is an equidigital number, since it uses as much as digits as its factorization.

47679691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69692.

The product of its digits is 571536, while the sum is 49.

The square root of 47679691 is about 6905.0482257548. The cubic root of 47679691 is about 362.6139247157.

The spelling of 47679691 in words is "forty-seven million, six hundred seventy-nine thousand, six hundred ninety-one".