54045991 has 2 divisors, whose sum is σ = 54045992. Its totient is φ = 54045990.

The previous prime is 54045977. The next prime is 54045997. The reversal of 54045991 is 19954045.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54045991 - 2¹⁷ = 53914919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54045991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54045997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27022995 + 27022996.

It is an arithmetic number, because the mean of its divisors is an integer number (27022996).

Almost surely, 2^54045991 is an apocalyptic number.

54045991 is a deficient number, since it is larger than the sum of its proper divisors (1).

54045991 is an equidigital number, since it uses as much as digits as its factorization.

54045991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 54045991 is about 7351.5978535282. The cubic root of 54045991 is about 378.0835901286.

The spelling of 54045991 in words is "fifty-four million, forty-five thousand, nine hundred ninety-one".