47154187 has 4 divisors (see below), whose sum is σ = 48250840. Its totient is φ = 46057536.

The previous prime is 47154139. The next prime is 47154199. The reversal of 47154187 is 78145174.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78145174 = 2 ⋅39072587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47154187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47154587) 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, 548262 + ... + 548347.

It is an arithmetic number, because the mean of its divisors is an integer number (12062710).

Almost surely, 2^47154187 is an apocalyptic number.

47154187 is a deficient number, since it is larger than the sum of its proper divisors (1096653).

47154187 is a wasteful number, since it uses less digits than its factorization.

47154187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096652.

The product of its digits is 31360, while the sum is 37.

The square root of 47154187 is about 6866.8906355060. The cubic root of 47154187 is about 361.2768113464.

The spelling of 47154187 in words is "forty-seven million, one hundred fifty-four thousand, one hundred eighty-seven".