47641861 has 4 divisors (see below), whose sum is σ = 47655724. Its totient is φ = 47628000.

The previous prime is 47641849. The next prime is 47641883. The reversal of 47641861 is 16814674.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20079361 + 27562500 = 4481^2 + 5250^2 .

It is a 3-Lehmer number, since φ(47641861) divides (47641861-1)³.

It is a cyclic number.

It is not a de Polignac number, because 47641861 - 2¹⁷ = 47510789 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 47641861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47641961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2521 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (11913931).

Almost surely, 2^47641861 is an apocalyptic number.

It is an amenable number.

47641861 is a deficient number, since it is larger than the sum of its proper divisors (13863).

47641861 is an equidigital number, since it uses as much as digits as its factorization.

47641861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13862.

The product of its digits is 32256, while the sum is 37.

The square root of 47641861 is about 6902.3083819835. The cubic root of 47641861 is about 362.5179976795.

The spelling of 47641861 in words is "forty-seven million, six hundred forty-one thousand, eight hundred sixty-one".