47220689 has 2 divisors, whose sum is σ = 47220690. Its totient is φ = 47220688.

The previous prime is 47220683. The next prime is 47220697. The reversal of 47220689 is 98602274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35796289 + 11424400 = 5983^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 47220689 - 2⁴ = 47220673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (47220683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23610344 + 23610345.

It is an arithmetic number, because the mean of its divisors is an integer number (23610345).

Almost surely, 2^47220689 is an apocalyptic number.

It is an amenable number.

47220689 is a deficient number, since it is larger than the sum of its proper divisors (1).

47220689 is an equidigital number, since it uses as much as digits as its factorization.

47220689 is an evil number, because the sum of its binary digits is even.

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

The square root of 47220689 is about 6871.7311501542. The cubic root of 47220689 is about 361.4465689463.

The spelling of 47220689 in words is "forty-seven million, two hundred twenty thousand, six hundred eighty-nine".