47311109 has 2 divisors, whose sum is σ = 47311110. Its totient is φ = 47311108.

The previous prime is 47311087. The next prime is 47311111. The reversal of 47311109 is 90111374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47306884 + 4225 = 6878^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 47311109 - 2¹⁶ = 47245573 is a prime.

Together with 47311111, 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 (47311189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23655554 + 23655555.

It is an arithmetic number, because the mean of its divisors is an integer number (23655555).

Almost surely, 2^47311109 is an apocalyptic number.

It is an amenable number.

47311109 is a deficient number, since it is larger than the sum of its proper divisors (1).

47311109 is an equidigital number, since it uses as much as digits as its factorization.

47311109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 47311109 is about 6878.3071318457. The cubic root of 47311109 is about 361.6771258015.

The spelling of 47311109 in words is "forty-seven million, three hundred eleven thousand, one hundred nine".