54991964 has 6 divisors (see below), whose sum is σ = 96235944. Its totient is φ = 27495980.

The previous prime is 54991949. The next prime is 54991967. The reversal of 54991964 is 46919945.

54991964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×54991964² = 6048232209154592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54991967) 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, 6873992 + ... + 6873999.

It is an arithmetic number, because the mean of its divisors is an integer number (16039324).

Almost surely, 2^54991964 is an apocalyptic number.

It is an amenable number.

54991964 is a deficient number, since it is larger than the sum of its proper divisors (41243980).

54991964 is a wasteful number, since it uses less digits than its factorization.

54991964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13747995 (or 13747993 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 54991964 is about 7415.6566802947. The cubic root of 54991964 is about 380.2767236431.

It can be divided in two parts, 54991 and 964, that added together give a palindrome (55955).

The spelling of 54991964 in words is "fifty-four million, nine hundred ninety-one thousand, nine hundred sixty-four".