47157891 has 8 divisors (see below), whose sum is σ = 68593344. Its totient is φ = 28580520.

The previous prime is 47157853. The next prime is 47157893. The reversal of 47157891 is 19875174.

47157891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 47157891 - 2¹³ = 47149699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47157893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714481 + ... + 714546.

It is an arithmetic number, because the mean of its divisors is an integer number (8574168).

Almost surely, 2^47157891 is an apocalyptic number.

47157891 is a deficient number, since it is larger than the sum of its proper divisors (21435453).

47157891 is a wasteful number, since it uses less digits than its factorization.

47157891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429041.

The product of its digits is 70560, while the sum is 42.

The square root of 47157891 is about 6867.1603301510. The cubic root of 47157891 is about 361.2862706285.

The spelling of 47157891 in words is "forty-seven million, one hundred fifty-seven thousand, eight hundred ninety-one".