47678019 has 4 divisors (see below), whose sum is σ = 63570696. Its totient is φ = 31785344.

The previous prime is 47678009. The next prime is 47678041. The reversal of 47678019 is 91087674.

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

It is a cyclic number.

It is not a de Polignac number, because 47678019 - 2⁷ = 47677891 is a prime.

It is a super-2 number, since 2×47678019² = 4546386991528722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47678009) 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, 7946334 + ... + 7946339.

It is an arithmetic number, because the mean of its divisors is an integer number (15892674).

Almost surely, 2^47678019 is an apocalyptic number.

47678019 is a deficient number, since it is larger than the sum of its proper divisors (15892677).

47678019 is a wasteful number, since it uses less digits than its factorization.

47678019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892676.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 47678019 is about 6904.9271538518. The cubic root of 47678019 is about 362.6096860308.

The spelling of 47678019 in words is "forty-seven million, six hundred seventy-eight thousand, nineteen".