47921843 has 2 divisors, whose sum is σ = 47921844. Its totient is φ = 47921842.

The previous prime is 47921807. The next prime is 47921851. The reversal of 47921843 is 34812974.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47921843 - 2¹⁸ = 47659699 is a prime.

It is equal to p_2883773 and since 47921843 and 2883773 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 47921797 and 47921806.

It is not a weakly prime, because it can be changed into another prime (47921873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23960921 + 23960922.

It is an arithmetic number, because the mean of its divisors is an integer number (23960922).

Almost surely, 2^47921843 is an apocalyptic number.

47921843 is a deficient number, since it is larger than the sum of its proper divisors (1).

47921843 is an equidigital number, since it uses as much as digits as its factorization.

47921843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 47921843 is about 6922.5604367170. The cubic root of 47921843 is about 363.2267604460.

It can be divided in two parts, 479 and 21843, that added together give a palindrome (22322).

The spelling of 47921843 in words is "forty-seven million, nine hundred twenty-one thousand, eight hundred forty-three".