47834921 has 2 divisors, whose sum is σ = 47834922. Its totient is φ = 47834920.

The previous prime is 47834909. The next prime is 47834933. The reversal of 47834921 is 12943874.

It is a balanced prime because it is at equal distance from previous prime (47834909) and next prime (47834933).

It can be written as a sum of positive squares in only one way, i.e., 33120025 + 14714896 = 5755^2 + 3836^2 .

It is a cyclic number.

It is not a de Polignac number, because 47834921 - 2¹⁰ = 47833897 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_2878814 and since 47834921 and 2878814 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (47834971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23917460 + 23917461.

It is an arithmetic number, because the mean of its divisors is an integer number (23917461).

Almost surely, 2^47834921 is an apocalyptic number.

It is an amenable number.

47834921 is a deficient number, since it is larger than the sum of its proper divisors (1).

47834921 is an equidigital number, since it uses as much as digits as its factorization.

47834921 is an odious number, because the sum of its binary digits is odd.

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

The square root of 47834921 is about 6916.2794188783. The cubic root of 47834921 is about 363.0070171952.

The spelling of 47834921 in words is "forty-seven million, eight hundred thirty-four thousand, nine hundred twenty-one".