47321857 has 4 divisors (see below), whose sum is σ = 51623856. Its totient is φ = 43019860.

The previous prime is 47321843. The next prime is 47321861. The reversal of 47321857 is 75812374.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47321857 - 2¹⁵ = 47289089 is a prime.

It is a pancake number, because a pancake can be divided into 47321857 parts by 9728 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47321867) 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, 2150983 + ... + 2151004.

It is an arithmetic number, because the mean of its divisors is an integer number (12905964).

Almost surely, 2^47321857 is an apocalyptic number.

It is an amenable number.

47321857 is a deficient number, since it is larger than the sum of its proper divisors (4301999).

47321857 is a wasteful number, since it uses less digits than its factorization.

47321857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301998.

The product of its digits is 47040, while the sum is 37.

The square root of 47321857 is about 6879.0883843719. The cubic root of 47321857 is about 361.7045119799.

The spelling of 47321857 in words is "forty-seven million, three hundred twenty-one thousand, eight hundred fifty-seven".