47890993 has 8 divisors (see below), whose sum is σ = 49734216. Its totient is φ = 46080000.

The previous prime is 47890967. The next prime is 47891021. The reversal of 47890993 is 39909874.

It can be written as a sum of positive squares in 4 ways, for example, as 5276209 + 42614784 = 2297^2 + 6528^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47890993 - 2²¹ = 45793841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47890903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5008 + ... + 10993.

It is an arithmetic number, because the mean of its divisors is an integer number (6216777).

Almost surely, 2^47890993 is an apocalyptic number.

It is an amenable number.

47890993 is a deficient number, since it is larger than the sum of its proper divisors (1843223).

47890993 is a wasteful number, since it uses less digits than its factorization.

47890993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16115.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 47890993 is about 6920.3318562046. The cubic root of 47890993 is about 363.1488005133.

The spelling of 47890993 in words is "forty-seven million, eight hundred ninety thousand, nine hundred ninety-three".