54799991 has 2 divisors, whose sum is σ = 54799992. Its totient is φ = 54799990.

The previous prime is 54799981. The next prime is 54800063. The reversal of 54799991 is 19999745.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54799991 - 2¹⁰ = 54798967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54799951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27399995 + 27399996.

It is an arithmetic number, because the mean of its divisors is an integer number (27399996).

Almost surely, 2^54799991 is an apocalyptic number.

54799991 is a deficient number, since it is larger than the sum of its proper divisors (1).

54799991 is an equidigital number, since it uses as much as digits as its factorization.

54799991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 53.

The square root of 54799991 is about 7402.7016014425. The cubic root of 54799991 is about 379.8337014720.

The spelling of 54799991 in words is "fifty-four million, seven hundred ninety-nine thousand, nine hundred ninety-one".