47158819 has 4 divisors (see below), whose sum is σ = 47625840. Its totient is φ = 46691800.

The previous prime is 47158801. The next prime is 47158823. The reversal of 47158819 is 91885174.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91885174 = 2 ⋅45942587.

It is a cyclic number.

It is not a de Polignac number, because 47158819 - 2²³ = 38770211 is a prime.

It is a super-2 number, since 2×47158819² = 4447908418949522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47158879) 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, 233359 + ... + 233560.

It is an arithmetic number, because the mean of its divisors is an integer number (11906460).

Almost surely, 2^47158819 is an apocalyptic number.

47158819 is a deficient number, since it is larger than the sum of its proper divisors (467021).

47158819 is a wasteful number, since it uses less digits than its factorization.

47158819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467020.

The product of its digits is 80640, while the sum is 43.

The square root of 47158819 is about 6867.2278977765. The cubic root of 47158819 is about 361.2886404791.

The spelling of 47158819 in words is "forty-seven million, one hundred fifty-eight thousand, eight hundred nineteen".