47709621 has 8 divisors (see below), whose sum is σ = 70680960. Its totient is φ = 31806396.

The previous prime is 47709587. The next prime is 47709637. The reversal of 47709621 is 12690774.

It is a happy number.

It is not a de Polignac number, because 47709621 - 2¹¹ = 47707573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47709671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883485 + ... + 883538.

It is an arithmetic number, because the mean of its divisors is an integer number (8835120).

Almost surely, 2^47709621 is an apocalyptic number.

It is an amenable number.

47709621 is a deficient number, since it is larger than the sum of its proper divisors (22971339).

47709621 is a wasteful number, since it uses less digits than its factorization.

47709621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767032 (or 1767026 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 47709621 is about 6907.2151407061. The cubic root of 47709621 is about 362.6897834612.

The spelling of 47709621 in words is "forty-seven million, seven hundred nine thousand, six hundred twenty-one".