47913993 has 6 divisors (see below), whose sum is σ = 69209114. Its totient is φ = 31942656.

The previous prime is 47913979. The next prime is 47914019. The reversal of 47913993 is 39931974.

It can be written as a sum of positive squares in only one way, i.e., 30173049 + 17740944 = 5493^2 + 4212^2 .

It is not a de Polignac number, because 47913993 - 2⁴ = 47913977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47913793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2661880 + ... + 2661897.

Almost surely, 2^47913993 is an apocalyptic number.

It is an amenable number.

47913993 is a deficient number, since it is larger than the sum of its proper divisors (21295121).

47913993 is a wasteful number, since it uses less digits than its factorization.

47913993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323783 (or 5323780 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 47913993 is about 6921.9934267522. The cubic root of 47913993 is about 363.2069261659.

The spelling of 47913993 in words is "forty-seven million, nine hundred thirteen thousand, nine hundred ninety-three".