47820001 has 4 divisors (see below), whose sum is σ = 47869632. Its totient is φ = 47770372.

The previous prime is 47819969. The next prime is 47820049. The reversal of 47820001 is 10002874.

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 47820001 - 2⁵ = 47819969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47820061) 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, 23341 + ... + 25306.

It is an arithmetic number, because the mean of its divisors is an integer number (11967408).

Almost surely, 2^47820001 is an apocalyptic number.

It is an amenable number.

47820001 is a deficient number, since it is larger than the sum of its proper divisors (49631).

47820001 is an equidigital number, since it uses as much as digits as its factorization.

47820001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49630.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 47820001 is about 6915.2007201527. The cubic root of 47820001 is about 362.9692719122.

Adding to 47820001 its reverse (10002874), we get a palindrome (57822875).

The spelling of 47820001 in words is "forty-seven million, eight hundred twenty thousand, one".