47623381 has 4 divisors (see below), whose sum is σ = 51286732. Its totient is φ = 43960032.

The previous prime is 47623351. The next prime is 47623391. The reversal of 47623381 is 18332674.

It is a happy number.

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 19000881 + 28622500 = 4359^2 + 5350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47623381 is a prime.

It is a super-2 number, since 2×47623381² = 4535972835742322, 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 (47623351) 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, 1831656 + ... + 1831681.

It is an arithmetic number, because the mean of its divisors is an integer number (12821683).

Almost surely, 2^47623381 is an apocalyptic number.

It is an amenable number.

47623381 is a deficient number, since it is larger than the sum of its proper divisors (3663351).

47623381 is a wasteful number, since it uses less digits than its factorization.

47623381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663350.

The product of its digits is 24192, while the sum is 34.

The square root of 47623381 is about 6900.9695695605. The cubic root of 47623381 is about 362.4711187454.

The spelling of 47623381 in words is "forty-seven million, six hundred twenty-three thousand, three hundred eighty-one".