54381091 has 2 divisors, whose sum is σ = 54381092. Its totient is φ = 54381090.

The previous prime is 54381071. The next prime is 54381139. The reversal of 54381091 is 19018345.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54381091 is a prime.

It is not a weakly prime, because it can be changed into another prime (54381001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27190545 + 27190546.

It is an arithmetic number, because the mean of its divisors is an integer number (27190546).

Almost surely, 2^54381091 is an apocalyptic number.

54381091 is a deficient number, since it is larger than the sum of its proper divisors (1).

54381091 is an equidigital number, since it uses as much as digits as its factorization.

54381091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 54381091 is about 7374.3535987909. The cubic root of 54381091 is about 378.8633880831.

The spelling of 54381091 in words is "fifty-four million, three hundred eighty-one thousand, ninety-one".