544120891 has 2 divisors, whose sum is σ = 544120892. Its totient is φ = 544120890.

The previous prime is 544120873. The next prime is 544120901. The reversal of 544120891 is 198021445.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-544120891 is a prime.

It is not a weakly prime, because it can be changed into another prime (544120861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272060445 + 272060446.

It is an arithmetic number, because the mean of its divisors is an integer number (272060446).

Almost surely, 2^544120891 is an apocalyptic number.

544120891 is a deficient number, since it is larger than the sum of its proper divisors (1).

544120891 is an equidigital number, since it uses as much as digits as its factorization.

544120891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 544120891 is about 23326.3990148501. The cubic root of 544120891 is about 816.3914859251.

The spelling of 544120891 in words is "five hundred forty-four million, one hundred twenty thousand, eight hundred ninety-one".