54144991 has 2 divisors, whose sum is σ = 54144992. Its totient is φ = 54144990.

The previous prime is 54144977. The next prime is 54145009. The reversal of 54144991 is 19944145.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54144991 - 2¹³ = 54136799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54144991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54144901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27072495 + 27072496.

It is an arithmetic number, because the mean of its divisors is an integer number (27072496).

Almost surely, 2^54144991 is an apocalyptic number.

54144991 is a deficient number, since it is larger than the sum of its proper divisors (1).

54144991 is an equidigital number, since it uses as much as digits as its factorization.

54144991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 54144991 is about 7358.3280030181. The cubic root of 54144991 is about 378.3143037817.

The spelling of 54144991 in words is "fifty-four million, one hundred forty-four thousand, nine hundred ninety-one".