54047491 has 4 divisors (see below), whose sum is σ = 55508272. Its totient is φ = 52586712.

The previous prime is 54047453. The next prime is 54047501. The reversal of 54047491 is 19474045.

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 54047491 - 2¹³ = 54039299 is a prime.

It is a super-2 number, since 2×54047491² = 5842262566790162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54057491) 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, 730335 + ... + 730408.

It is an arithmetic number, because the mean of its divisors is an integer number (13877068).

Almost surely, 2^54047491 is an apocalyptic number.

54047491 is a deficient number, since it is larger than the sum of its proper divisors (1460781).

54047491 is a wasteful number, since it uses less digits than its factorization.

54047491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460780.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 54047491 is about 7351.6998714583. The cubic root of 54047491 is about 378.0870878912.

The spelling of 54047491 in words is "fifty-four million, forty-seven thousand, four hundred ninety-one".