47207917 has 2 divisors, whose sum is σ = 47207918. Its totient is φ = 47207916.

The previous prime is 47207899. The next prime is 47207921. The reversal of 47207917 is 71970274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42653961 + 4553956 = 6531^2 + 2134^2 .

It is a cyclic number.

It is not a de Polignac number, because 47207917 - 2¹¹ = 47205869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47207117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23603958 + 23603959.

It is an arithmetic number, because the mean of its divisors is an integer number (23603959).

Almost surely, 2^47207917 is an apocalyptic number.

It is an amenable number.

47207917 is a deficient number, since it is larger than the sum of its proper divisors (1).

47207917 is an equidigital number, since it uses as much as digits as its factorization.

47207917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 47207917 is about 6870.8017727191. The cubic root of 47207917 is about 361.4139786280.

The spelling of 47207917 in words is "forty-seven million, two hundred seven thousand, nine hundred seventeen".