47478797 has 4 divisors (see below), whose sum is σ = 47606460. Its totient is φ = 47351136.

The previous prime is 47478793. The next prime is 47478839. The reversal of 47478797 is 79787474.

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 14600041 + 32878756 = 3821^2 + 5734^2 .

It is a cyclic number.

It is not a de Polignac number, because 47478797 - 2² = 47478793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47478791) 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, 63272 + ... + 64017.

It is an arithmetic number, because the mean of its divisors is an integer number (11901615).

Almost surely, 2^47478797 is an apocalyptic number.

It is an amenable number.

47478797 is a deficient number, since it is larger than the sum of its proper divisors (127663).

47478797 is a wasteful number, since it uses less digits than its factorization.

47478797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127662.

The product of its digits is 2765952, while the sum is 53.

The square root of 47478797 is about 6890.4859770556. The cubic root of 47478797 is about 362.1039276097.

The spelling of 47478797 in words is "forty-seven million, four hundred seventy-eight thousand, seven hundred ninety-seven".