54993979 has 2 divisors, whose sum is σ = 54993980. Its totient is φ = 54993978.

The previous prime is 54993977. The next prime is 54994003. The reversal of 54993979 is 97939945.

54993979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54993979 - 2¹ = 54993977 is a prime.

Together with 54993977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (54993971) 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, 27496989 + 27496990.

It is an arithmetic number, because the mean of its divisors is an integer number (27496990).

Almost surely, 2^54993979 is an apocalyptic number.

54993979 is a deficient number, since it is larger than the sum of its proper divisors (1).

54993979 is an equidigital number, since it uses as much as digits as its factorization.

54993979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 55.

The square root of 54993979 is about 7415.7925402481. The cubic root of 54993979 is about 380.2813682505.

It can be divided in two parts, 549939 and 79, that multiplied together give a triangular number (43445181 = T₉₃₂₁).

The spelling of 54993979 in words is "fifty-four million, nine hundred ninety-three thousand, nine hundred seventy-nine".