54991291 has 8 divisors (see below), whose sum is σ = 56697984. Its totient is φ = 53302080.

The previous prime is 54991253. The next prime is 54991309. The reversal of 54991291 is 19219945.

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 54991291 - 2¹⁹ = 54467003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54991891) 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, 2166 + ... + 10708.

It is an arithmetic number, because the mean of its divisors is an integer number (7087248).

Almost surely, 2^54991291 is an apocalyptic number.

54991291 is a deficient number, since it is larger than the sum of its proper divisors (1706693).

54991291 is a wasteful number, since it uses less digits than its factorization.

54991291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8741.

The product of its digits is 29160, while the sum is 40.

The square root of 54991291 is about 7415.6113031900. The cubic root of 54991291 is about 380.2751723420.

The spelling of 54991291 in words is "fifty-four million, nine hundred ninety-one thousand, two hundred ninety-one".