47994447 has 4 divisors (see below), whose sum is σ = 63992600. Its totient is φ = 31996296.

The previous prime is 47994433. The next prime is 47994461. The reversal of 47994447 is 74449974.

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

It is an interprime number because it is at equal distance from previous prime (47994433) and next prime (47994461).

It is a de Polignac number, because none of the positive numbers 2^k-47994447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47994396 and 47994405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47994467) 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, 7999072 + ... + 7999077.

It is an arithmetic number, because the mean of its divisors is an integer number (15998150).

Almost surely, 2^47994447 is an apocalyptic number.

47994447 is a deficient number, since it is larger than the sum of its proper divisors (15998153).

47994447 is a wasteful number, since it uses less digits than its factorization.

47994447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15998152.

The product of its digits is 1016064, while the sum is 48.

The square root of 47994447 is about 6927.8024654287. The cubic root of 47994447 is about 363.4101034834.

The spelling of 47994447 in words is "forty-seven million, nine hundred ninety-four thousand, four hundred forty-seven".