54171947 has 4 divisors (see below), whose sum is σ = 55493256. Its totient is φ = 52850640.

The previous prime is 54171937. The next prime is 54171991. The reversal of 54171947 is 74917145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74917145 = 5 ⋅14983429.

It is not a de Polignac number, because 54171947 - 2¹⁶ = 54106411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54171947.

It is not an unprimeable number, because it can be changed into a prime (54171937) 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, 660593 + ... + 660674.

It is an arithmetic number, because the mean of its divisors is an integer number (13873314).

Almost surely, 2^54171947 is an apocalyptic number.

54171947 is a deficient number, since it is larger than the sum of its proper divisors (1321309).

54171947 is a wasteful number, since it uses less digits than its factorization.

54171947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321308.

The product of its digits is 35280, while the sum is 38.

The square root of 54171947 is about 7360.1594412078. The cubic root of 54171947 is about 378.3770744297.

The spelling of 54171947 in words is "fifty-four million, one hundred seventy-one thousand, nine hundred forty-seven".