55620969 has 16 divisors (see below), whose sum is σ = 79277184. Its totient is φ = 34601600.

The previous prime is 55620949. The next prime is 55621019. The reversal of 55620969 is 96902655.

55620969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55620969 - 2⁷ = 55620841 is a prime.

It is a super-2 number, since 2×55620969² = 6187384384997922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55620969.

It is not an unprimeable number, because it can be changed into a prime (55620949) 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 15 ways as a sum of consecutive naturals, for example, 7002 + ... + 12659.

It is an arithmetic number, because the mean of its divisors is an integer number (4954824).

Almost surely, 2^55620969 is an apocalyptic number.

It is an amenable number.

55620969 is a deficient number, since it is larger than the sum of its proper divisors (23656215).

55620969 is a wasteful number, since it uses less digits than its factorization.

55620969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19728.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 55620969 is about 7457.9467013381. The cubic root of 55620969 is about 381.7211148482.

The spelling of 55620969 in words is "fifty-five million, six hundred twenty thousand, nine hundred sixty-nine".