47387187 has 14 divisors (see below), whose sum is σ = 71049372. Its totient is φ = 31590972.

The previous prime is 47387173. The next prime is 47387191. The reversal of 47387187 is 78178374.

It is a happy number.

It is not a de Polignac number, because 47387187 - 2⁷ = 47387059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47387117) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 31773 + ... + 33230.

Almost surely, 2^47387187 is an apocalyptic number.

47387187 is a deficient number, since it is larger than the sum of its proper divisors (23662185).

47387187 is an frugal number, since it uses more digits than its factorization.

47387187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65021 (or 65006 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 47387187 is about 6883.8351955868. The cubic root of 47387187 is about 361.8708853461.

It can be divided in two parts, 47387 and 187, that added together give a palindrome (47574).

The spelling of 47387187 in words is "forty-seven million, three hundred eighty-seven thousand, one hundred eighty-seven".