47879121 has 4 divisors (see below), whose sum is σ = 63838832. Its totient is φ = 31919412.

The previous prime is 47879113. The next prime is 47879129. The reversal of 47879121 is 12197874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (47879113) and next prime (47879129).

It is not a de Polignac number, because 47879121 - 2³ = 47879113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47879121.

It is not an unprimeable number, because it can be changed into a prime (47879129) 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, 7979851 + ... + 7979856.

It is an arithmetic number, because the mean of its divisors is an integer number (15959708).

Almost surely, 2^47879121 is an apocalyptic number.

It is an amenable number.

47879121 is a deficient number, since it is larger than the sum of its proper divisors (15959711).

47879121 is a wasteful number, since it uses less digits than its factorization.

47879121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15959710.

The product of its digits is 28224, while the sum is 39.

The square root of 47879121 is about 6919.4740407057. The cubic root of 47879121 is about 363.1187902853.

The spelling of 47879121 in words is "forty-seven million, eight hundred seventy-nine thousand, one hundred twenty-one".