47317949 has 4 divisors (see below), whose sum is σ = 54077664. Its totient is φ = 40558236.

The previous prime is 47317927. The next prime is 47317981. The reversal of 47317949 is 94971374.

It is a happy number.

47317949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94971374 = 2 ⋅47485687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47317949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47317909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3379847 + ... + 3379860.

It is an arithmetic number, because the mean of its divisors is an integer number (13519416).

Almost surely, 2^47317949 is an apocalyptic number.

It is an amenable number.

47317949 is a deficient number, since it is larger than the sum of its proper divisors (6759715).

47317949 is an equidigital number, since it uses as much as digits as its factorization.

47317949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6759714.

The product of its digits is 190512, while the sum is 44.

The square root of 47317949 is about 6878.8043292421. The cubic root of 47317949 is about 361.6945547760.

The spelling of 47317949 in words is "forty-seven million, three hundred seventeen thousand, nine hundred forty-nine".