47819381 has 4 divisors (see below), whose sum is σ = 47942700. Its totient is φ = 47696064.

The previous prime is 47819377. The next prime is 47819383. The reversal of 47819381 is 18391874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5958481 + 41860900 = 2441^2 + 6470^2 .

It is a cyclic number.

It is not a de Polignac number, because 47819381 - 2² = 47819377 is a prime.

It is a super-2 number, since 2×47819381² = 4573386398446322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47819383) 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, 61076 + ... + 61853.

It is an arithmetic number, because the mean of its divisors is an integer number (11985675).

Almost surely, 2^47819381 is an apocalyptic number.

It is an amenable number.

47819381 is a deficient number, since it is larger than the sum of its proper divisors (123319).

47819381 is a wasteful number, since it uses less digits than its factorization.

47819381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123318.

The product of its digits is 48384, while the sum is 41.

The square root of 47819381 is about 6915.1558912291. The cubic root of 47819381 is about 362.9677032385.

The spelling of 47819381 in words is "forty-seven million, eight hundred nineteen thousand, three hundred eighty-one".