Search a number
47899 = 192521
BaseRepresentation
bin1011101100011011
32102201001
423230123
53013044
61005431
7256435
oct135433
972631
1047899
1132a95
1223877
1318a57
1413655
15e2d4
hexbb1b

47899 has 4 divisors (see below), whose sum is σ = 50440. Its totient is φ = 45360.

The previous prime is 47881. The next prime is 47903. The reversal of 47899 is 99874.

It can be divided in two parts, 47 and 899, that added together give a triangular number (946 = T43).

47899 = T30 + T31 + ... + T67.

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: 99874 = 249937.

It is a cyclic number.

It is not a de Polignac number, because 47899 - 29 = 47387 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (47809) 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, 1242 + ... + 1279.

It is an arithmetic number, because the mean of its divisors is an integer number (12610).

247899 is an apocalyptic number.

47899 is a deficient number, since it is larger than the sum of its proper divisors (2541).

47899 is a wasteful number, since it uses less digits than its factorization.

47899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540.

The product of its digits is 18144, while the sum is 37.

The square root of 47899 is about 218.8584017122. The cubic root of 47899 is about 36.3169037933.

The spelling of 47899 in words is "forty-seven thousand, eight hundred ninety-nine".

Divisors: 1 19 2521 47899