47642897 has 4 divisors (see below), whose sum is σ = 47715636. Its totient is φ = 47570160.

The previous prime is 47642893. The next prime is 47642921. The reversal of 47642897 is 79824674.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18309841 + 29333056 = 4279^2 + 5416^2 .

It is a cyclic number.

It is not a de Polignac number, because 47642897 - 2² = 47642893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47642893) 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, 35378 + ... + 36699.

It is an arithmetic number, because the mean of its divisors is an integer number (11928909).

Almost surely, 2^47642897 is an apocalyptic number.

It is an amenable number.

47642897 is a deficient number, since it is larger than the sum of its proper divisors (72739).

47642897 is an equidigital number, since it uses as much as digits as its factorization.

47642897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72738.

The product of its digits is 677376, while the sum is 47.

The square root of 47642897 is about 6902.3834289324. The cubic root of 47642897 is about 362.5206253821.

The spelling of 47642897 in words is "forty-seven million, six hundred forty-two thousand, eight hundred ninety-seven".