47642891 has 8 divisors (see below), whose sum is σ = 51273504. Its totient is φ = 44104320.

The previous prime is 47642887. The next prime is 47642893. The reversal of 47642891 is 19824674.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47642891 - 2² = 47642887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47642893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21935 + ... + 24008.

It is an arithmetic number, because the mean of its divisors is an integer number (6409188).

Almost surely, 2^47642891 is an apocalyptic number.

47642891 is a deficient number, since it is larger than the sum of its proper divisors (3630613).

47642891 is a wasteful number, since it uses less digits than its factorization.

47642891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46021.

The product of its digits is 96768, while the sum is 41.

The square root of 47642891 is about 6902.3829942999. The cubic root of 47642891 is about 362.5206101639.

The spelling of 47642891 in words is "forty-seven million, six hundred forty-two thousand, eight hundred ninety-one".