47973161 has 2 divisors, whose sum is σ = 47973162. Its totient is φ = 47973160.

The previous prime is 47973143. The next prime is 47973169. The reversal of 47973161 is 16137974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25694761 + 22278400 = 5069^2 + 4720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47973161 is a prime.

It is not a weakly prime, because it can be changed into another prime (47973169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23986580 + 23986581.

It is an arithmetic number, because the mean of its divisors is an integer number (23986581).

Almost surely, 2^47973161 is an apocalyptic number.

It is an amenable number.

47973161 is a deficient number, since it is larger than the sum of its proper divisors (1).

47973161 is an equidigital number, since it uses as much as digits as its factorization.

47973161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 38.

The square root of 47973161 is about 6926.2660214577. The cubic root of 47973161 is about 363.3563702439.

The spelling of 47973161 in words is "forty-seven million, nine hundred seventy-three thousand, one hundred sixty-one".