47508921 has 6 divisors (see below), whose sum is σ = 68624010. Its totient is φ = 31672608.

The previous prime is 47508919. The next prime is 47508947. The reversal of 47508921 is 12980574.

It can be written as a sum of positive squares in only one way, i.e., 47073321 + 435600 = 6861^2 + 660^2 .

It is not a de Polignac number, because 47508921 - 2¹ = 47508919 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47508991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2639376 + ... + 2639393.

It is an arithmetic number, because the mean of its divisors is an integer number (11437335).

Almost surely, 2^47508921 is an apocalyptic number.

It is an amenable number.

47508921 is a deficient number, since it is larger than the sum of its proper divisors (21115089).

47508921 is a wasteful number, since it uses less digits than its factorization.

47508921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278775 (or 5278772 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 47508921 is about 6892.6715430231. The cubic root of 47508921 is about 362.1804931033.

The spelling of 47508921 in words is "forty-seven million, five hundred eight thousand, nine hundred twenty-one".