55669091 has 4 divisors (see below), whose sum is σ = 55874784. Its totient is φ = 55463400.

The previous prime is 55669073. The next prime is 55669093. The reversal of 55669091 is 19096655.

55669091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19096655 = 5 ⋅3819331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55669091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55669093) 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 3 ways as a sum of consecutive naturals, for example, 102440 + ... + 102981.

It is an arithmetic number, because the mean of its divisors is an integer number (13968696).

Almost surely, 2^55669091 is an apocalyptic number.

55669091 is a deficient number, since it is larger than the sum of its proper divisors (205693).

55669091 is a wasteful number, since it uses less digits than its factorization.

55669091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205692.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 55669091 is about 7461.1722269359. The cubic root of 55669091 is about 381.8311685973.

The spelling of 55669091 in words is "fifty-five million, six hundred sixty-nine thousand, ninety-one".