47218279 has 2 divisors, whose sum is σ = 47218280. Its totient is φ = 47218278.

The previous prime is 47218273. The next prime is 47218307. The reversal of 47218279 is 97281274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47218279 - 2¹¹ = 47216231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47218273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23609139 + 23609140.

It is an arithmetic number, because the mean of its divisors is an integer number (23609140).

Almost surely, 2^47218279 is an apocalyptic number.

47218279 is a deficient number, since it is larger than the sum of its proper divisors (1).

47218279 is an equidigital number, since it uses as much as digits as its factorization.

47218279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 47218279 is about 6871.5557918131. Note that the first 3 decimals coincide. The cubic root of 47218279 is about 361.4404197980.

The spelling of 47218279 in words is "forty-seven million, two hundred eighteen thousand, two hundred seventy-nine".