54991949 has 2 divisors, whose sum is σ = 54991950. Its totient is φ = 54991948.

The previous prime is 54991933. The next prime is 54991967. The reversal of 54991949 is 94919945.

54991949 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 can be written as a sum of positive squares in only one way, i.e., 41190724 + 13801225 = 6418^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 54991949 - 2⁴ = 54991933 is a prime.

It is a super-2 number, since 2×54991949² = 6048228909637202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54991897 and 54991906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54991999) 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, 27495974 + 27495975.

It is an arithmetic number, because the mean of its divisors is an integer number (27495975).

Almost surely, 2^54991949 is an apocalyptic number.

It is an amenable number.

54991949 is a deficient number, since it is larger than the sum of its proper divisors (1).

54991949 is an equidigital number, since it uses as much as digits as its factorization.

54991949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 50.

The square root of 54991949 is about 7415.6556689210. The cubic root of 54991949 is about 380.2766890675.

The spelling of 54991949 in words is "fifty-four million, nine hundred ninety-one thousand, nine hundred forty-nine".