47123117 has 2 divisors, whose sum is σ = 47123118. Its totient is φ = 47123116.

The previous prime is 47123107. The next prime is 47123119. The reversal of 47123117 is 71132174.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36554116 + 10569001 = 6046^2 + 3251^2 .

It is a cyclic number.

It is not a de Polignac number, because 47123117 - 2⁶ = 47123053 is a prime.

Together with 47123119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47123119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23561558 + 23561559.

It is an arithmetic number, because the mean of its divisors is an integer number (23561559).

Almost surely, 2^47123117 is an apocalyptic number.

It is an amenable number.

47123117 is a deficient number, since it is larger than the sum of its proper divisors (1).

47123117 is an equidigital number, since it uses as much as digits as its factorization.

47123117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 47123117 is about 6864.6279578722. The cubic root of 47123117 is about 361.1974452108.

The spelling of 47123117 in words is "forty-seven million, one hundred twenty-three thousand, one hundred seventeen".