55875709 has 2 divisors, whose sum is σ = 55875710. Its totient is φ = 55875708.

The previous prime is 55875667. The next prime is 55875731. The reversal of 55875709 is 90757855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51079609 + 4796100 = 7147^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 55875709 - 2²³ = 47487101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55875739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27937854 + 27937855.

It is an arithmetic number, because the mean of its divisors is an integer number (27937855).

Almost surely, 2^55875709 is an apocalyptic number.

It is an amenable number.

55875709 is a deficient number, since it is larger than the sum of its proper divisors (1).

55875709 is an equidigital number, since it uses as much as digits as its factorization.

55875709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 441000, while the sum is 46.

The square root of 55875709 is about 7475.0056187270. The cubic root of 55875709 is about 382.3029791160.

It can be divided in two parts, 558 and 75709, that added together give a palindrome (76267).

The spelling of 55875709 in words is "fifty-five million, eight hundred seventy-five thousand, seven hundred nine".