47878081 has 4 divisors (see below), whose sum is σ = 50398000. Its totient is φ = 45358164.

The previous prime is 47878079. The next prime is 47878091. The reversal of 47878081 is 18087874.

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 a cyclic number.

It is not a de Polignac number, because 47878081 - 2¹ = 47878079 is a prime.

It is a super-2 number, since 2×47878081² = 4584621280485122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47878031) 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, 1259931 + ... + 1259968.

It is an arithmetic number, because the mean of its divisors is an integer number (12599500).

Almost surely, 2^47878081 is an apocalyptic number.

It is an amenable number.

47878081 is a deficient number, since it is larger than the sum of its proper divisors (2519919).

47878081 is a wasteful number, since it uses less digits than its factorization.

47878081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519918.

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 47878081 is about 6919.3988900771. The cubic root of 47878081 is about 363.1161611206.

The spelling of 47878081 in words is "forty-seven million, eight hundred seventy-eight thousand, eighty-one".