47380891 has 4 divisors (see below), whose sum is σ = 47397672. Its totient is φ = 47364112.

The previous prime is 47380849. The next prime is 47380903. The reversal of 47380891 is 19808374.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47380891 - 2¹¹ = 47378843 is a prime.

It is a super-4 number, since 4×47380891⁴ (a number of 32 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47380691) 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, 3001 + ... + 10186.

It is an arithmetic number, because the mean of its divisors is an integer number (11849418).

Almost surely, 2^47380891 is an apocalyptic number.

47380891 is a deficient number, since it is larger than the sum of its proper divisors (16781).

47380891 is a wasteful number, since it uses less digits than its factorization.

47380891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16780.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 47380891 is about 6883.3778771763. The cubic root of 47380891 is about 361.8548582289.

The spelling of 47380891 in words is "forty-seven million, three hundred eighty thousand, eight hundred ninety-one".