47561387 has 4 divisors (see below), whose sum is σ = 47997840. Its totient is φ = 47124936.

The previous prime is 47561377. The next prime is 47561399. The reversal of 47561387 is 78316574.

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 47561387 - 2²² = 43367083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47561377) 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, 218063 + ... + 218280.

It is an arithmetic number, because the mean of its divisors is an integer number (11999460).

Almost surely, 2^47561387 is an apocalyptic number.

47561387 is a deficient number, since it is larger than the sum of its proper divisors (436453).

47561387 is a wasteful number, since it uses less digits than its factorization.

47561387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436452.

The product of its digits is 141120, while the sum is 41.

The square root of 47561387 is about 6896.4764191578. The cubic root of 47561387 is about 362.3137675192.

The spelling of 47561387 in words is "forty-seven million, five hundred sixty-one thousand, three hundred eighty-seven".