47071621 has 4 divisors (see below), whose sum is σ = 47093472. Its totient is φ = 47049772.

The previous prime is 47071573. The next prime is 47071631. The reversal of 47071621 is 12617074.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47071621 - 2¹⁷ = 46940549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47071621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47071631) 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, 7291 + ... + 12136.

It is an arithmetic number, because the mean of its divisors is an integer number (11773368).

Almost surely, 2^47071621 is an apocalyptic number.

It is an amenable number.

47071621 is a deficient number, since it is larger than the sum of its proper divisors (21851).

47071621 is a wasteful number, since it uses less digits than its factorization.

47071621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21850.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 47071621 is about 6860.8761102355. The cubic root of 47071621 is about 361.0658254287.

Adding to 47071621 its reverse (12617074), we get a palindrome (59688695).

It can be divided in two parts, 4707 and 1621, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 47071621 in words is "forty-seven million, seventy-one thousand, six hundred twenty-one".