49478447 has 4 divisors (see below), whose sum is σ = 49495320. Its totient is φ = 49461576.

The previous prime is 49478441. The next prime is 49478459. The reversal of 49478447 is 74487494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74487494 = 2 ⋅37243747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49478447 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 (49478441) 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, 2768 + ... + 10325.

It is an arithmetic number, because the mean of its divisors is an integer number (12373830).

Almost surely, 2^49478447 is an apocalyptic number.

49478447 is a deficient number, since it is larger than the sum of its proper divisors (16873).

49478447 is a wasteful number, since it uses less digits than its factorization.

49478447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16872.

The product of its digits is 903168, while the sum is 47.

The square root of 49478447 is about 7034.0917679541. The cubic root of 49478447 is about 367.1177248809.

The spelling of 49478447 in words is "forty-nine million, four hundred seventy-eight thousand, four hundred forty-seven".