54072991 has 8 divisors (see below), whose sum is σ = 61876224. Its totient is φ = 46289400.

The previous prime is 54072979. The next prime is 54073079. The reversal of 54072991 is 19927045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54072991 - 2²³ = 45684383 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 54072991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54072191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566 + ... + 10516.

It is an arithmetic number, because the mean of its divisors is an integer number (7734528).

Almost surely, 2^54072991 is an apocalyptic number.

54072991 is a deficient number, since it is larger than the sum of its proper divisors (7803233).

54072991 is an equidigital number, since it uses as much as digits as its factorization.

54072991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 54072991 is about 7353.4339597225. The cubic root of 54072991 is about 378.1465399564.

The spelling of 54072991 in words is "fifty-four million, seventy-two thousand, nine hundred ninety-one".