54103991 has 2 divisors, whose sum is σ = 54103992. Its totient is φ = 54103990.

The previous prime is 54103967. The next prime is 54103999. The reversal of 54103991 is 19930145.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54103991 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 (54103999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27051995 + 27051996.

It is an arithmetic number, because the mean of its divisors is an integer number (27051996).

Almost surely, 2^54103991 is an apocalyptic number.

54103991 is a deficient number, since it is larger than the sum of its proper divisors (1).

54103991 is an equidigital number, since it uses as much as digits as its factorization.

54103991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 54103991 is about 7355.5415164351. The cubic root of 54103991 is about 378.2187898484.

The spelling of 54103991 in words is "fifty-four million, one hundred three thousand, nine hundred ninety-one".