47612321 has 4 divisors (see below), whose sum is σ = 47627412. Its totient is φ = 47597232.

The previous prime is 47612317. The next prime is 47612329. The reversal of 47612321 is 12321674.

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 26635921 + 20976400 = 5161^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 47612321 - 2² = 47612317 is a prime.

It is a super-2 number, since 2×47612321² = 4533866222014082, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47612329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806 + ... + 9791.

It is an arithmetic number, because the mean of its divisors is an integer number (11906853).

Almost surely, 2^47612321 is an apocalyptic number.

It is an amenable number.

47612321 is a deficient number, since it is larger than the sum of its proper divisors (15091).

47612321 is a wasteful number, since it uses less digits than its factorization.

47612321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15090.

The product of its digits is 2016, while the sum is 26.

The square root of 47612321 is about 6900.1681863560. The cubic root of 47612321 is about 362.4430566124.

Adding to 47612321 its reverse (12321674), we get a palindrome (59933995).

The spelling of 47612321 in words is "forty-seven million, six hundred twelve thousand, three hundred twenty-one".