47835721 has 8 divisors (see below), whose sum is σ = 48471624. Its totient is φ = 47203200.

The previous prime is 47835713. The next prime is 47835727. The reversal of 47835721 is 12753874.

It can be written as a sum of positive squares in 4 ways, for example, as 23629321 + 24206400 = 4861^2 + 4920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47835721 - 2³ = 47835713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47835727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39501 + ... + 40693.

It is an arithmetic number, because the mean of its divisors is an integer number (6058953).

Almost surely, 2^47835721 is an apocalyptic number.

It is an amenable number.

47835721 is a deficient number, since it is larger than the sum of its proper divisors (635903).

47835721 is a wasteful number, since it uses less digits than its factorization.

47835721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691.

The product of its digits is 47040, while the sum is 37.

The square root of 47835721 is about 6916.3372531998. The cubic root of 47835721 is about 363.0090408492.

The spelling of 47835721 in words is "forty-seven million, eight hundred thirty-five thousand, seven hundred twenty-one".