47578897 has 2 divisors, whose sum is σ = 47578898. Its totient is φ = 47578896.

The previous prime is 47578891. The next prime is 47578913. The reversal of 47578897 is 79887574.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27499536 + 20079361 = 5244^2 + 4481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47578897 is a prime.

It is not a weakly prime, because it can be changed into another prime (47578891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23789448 + 23789449.

It is an arithmetic number, because the mean of its divisors is an integer number (23789449).

Almost surely, 2^47578897 is an apocalyptic number.

It is an amenable number.

47578897 is a deficient number, since it is larger than the sum of its proper divisors (1).

47578897 is an equidigital number, since it uses as much as digits as its factorization.

47578897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3951360, while the sum is 55.

The square root of 47578897 is about 6897.7457911987. The cubic root of 47578897 is about 362.3582247010.

The spelling of 47578897 in words is "forty-seven million, five hundred seventy-eight thousand, eight hundred ninety-seven".