47405887 has 4 divisors (see below), whose sum is σ = 47767896. Its totient is φ = 47043880.

The previous prime is 47405879. The next prime is 47405929. The reversal of 47405887 is 78850474.

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 47405887 - 2³ = 47405879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47405087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180808 + ... + 181069.

It is an arithmetic number, because the mean of its divisors is an integer number (11941974).

Almost surely, 2^47405887 is an apocalyptic number.

47405887 is a deficient number, since it is larger than the sum of its proper divisors (362009).

47405887 is a wasteful number, since it uses less digits than its factorization.

47405887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362008.

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 47405887 is about 6885.1933160951. The cubic root of 47405887 is about 361.9184797561.

The spelling of 47405887 in words is "forty-seven million, four hundred five thousand, eight hundred eighty-seven".