55919709 has 6 divisors (see below), whose sum is σ = 80772926. Its totient is φ = 37279800.

The previous prime is 55919687. The next prime is 55919711. The reversal of 55919709 is 90791955.

55919709 is a `hidden beast` number, since 559 + 1 + 97 + 0 + 9 = 666.

55919709 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., 43599609 + 12320100 = 6603^2 + 3510^2 .

It is not a de Polignac number, because 55919709 - 2⁷ = 55919581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55919209) 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, 3106642 + ... + 3106659.

Almost surely, 2^55919709 is an apocalyptic number.

It is an amenable number.

55919709 is a deficient number, since it is larger than the sum of its proper divisors (24853217).

55919709 is a wasteful number, since it uses less digits than its factorization.

55919709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213307 (or 6213304 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 55919709 is about 7477.9481811524. The cubic root of 55919709 is about 382.4033024821.

The spelling of 55919709 in words is "fifty-five million, nine hundred nineteen thousand, seven hundred nine".