55920069 has 6 divisors (see below), whose sum is σ = 80773446. Its totient is φ = 37280040.

The previous prime is 55920049. The next prime is 55920077. The reversal of 55920069 is 96002955.

55920069 is a `hidden beast` number, since 5 + 592 + 0 + 0 + 69 = 666.

55920069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 30669444 + 25250625 = 5538^2 + 5025^2 .

It is not a de Polignac number, because 55920069 - 2⁹ = 55919557 is a prime.

It is a super-2 number, since 2×55920069² = 6254108233929522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55920049) 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 in 5 ways as a sum of consecutive naturals, for example, 3106662 + ... + 3106679.

It is an arithmetic number, because the mean of its divisors is an integer number (13462241).

Almost surely, 2^55920069 is an apocalyptic number.

It is an amenable number.

55920069 is a deficient number, since it is larger than the sum of its proper divisors (24853377).

55920069 is a wasteful number, since it uses less digits than its factorization.

55920069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213347 (or 6213344 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 55920069 is about 7477.9722518875. The cubic root of 55920069 is about 382.4041230925.

The spelling of 55920069 in words is "fifty-five million, nine hundred twenty thousand, sixty-nine".