47919393 has 6 divisors (see below), whose sum is σ = 69216914. Its totient is φ = 31946256.

The previous prime is 47919371. The next prime is 47919427. The reversal of 47919393 is 39391974.

47919393 is a `hidden beast` number, since 479 + 1 + 93 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31002624 + 16916769 = 5568^2 + 4113^2 .

It is not a de Polignac number, because 47919393 - 2⁹ = 47918881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47919353) 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, 2662180 + ... + 2662197.

Almost surely, 2^47919393 is an apocalyptic number.

It is an amenable number.

47919393 is a deficient number, since it is larger than the sum of its proper divisors (21297521).

47919393 is a wasteful number, since it uses less digits than its factorization.

47919393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324383 (or 5324380 counting only the distinct ones).

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

The square root of 47919393 is about 6922.3834768091. The cubic root of 47919393 is about 363.2205703618.

The spelling of 47919393 in words is "forty-seven million, nine hundred nineteen thousand, three hundred ninety-three".