47437993 has 4 divisors (see below), whose sum is σ = 48447360. Its totient is φ = 46428628.

The previous prime is 47437991. The next prime is 47438047. The reversal of 47437993 is 39973474.

It is a happy number.

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: 39973474 = 2 ⋅19986737.

It is a cyclic number.

It is not a de Polignac number, because 47437993 - 2¹ = 47437991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47437991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504613 + ... + 504706.

It is an arithmetic number, because the mean of its divisors is an integer number (12111840).

Almost surely, 2^47437993 is an apocalyptic number.

It is an amenable number.

47437993 is a deficient number, since it is larger than the sum of its proper divisors (1009367).

47437993 is a wasteful number, since it uses less digits than its factorization.

47437993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009366.

The product of its digits is 571536, while the sum is 46.

The square root of 47437993 is about 6887.5244464176. The cubic root of 47437993 is about 362.0001653388. Note that the first 3 decimals are identical.

The spelling of 47437993 in words is "forty-seven million, four hundred thirty-seven thousand, nine hundred ninety-three".