47397209 has 2 divisors, whose sum is σ = 47397210. Its totient is φ = 47397208.

The previous prime is 47397169. The next prime is 47397247. The reversal of 47397209 is 90279374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36638809 + 10758400 = 6053^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 47397209 - 2⁸ = 47396953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47397269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23698604 + 23698605.

It is an arithmetic number, because the mean of its divisors is an integer number (23698605).

Almost surely, 2^47397209 is an apocalyptic number.

It is an amenable number.

47397209 is a deficient number, since it is larger than the sum of its proper divisors (1).

47397209 is an equidigital number, since it uses as much as digits as its factorization.

47397209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 47397209 is about 6884.5630943438. The cubic root of 47397209 is about 361.8963944524.

The spelling of 47397209 in words is "forty-seven million, three hundred ninety-seven thousand, two hundred nine".