55709005 has 20 divisors (see below), whose sum is σ = 73632060. Its totient is φ = 40462400.

The previous prime is 55708993. The next prime is 55709009. The reversal of 55709005 is 50090755.

It can be written as a sum of positive squares in 2 ways, for example, as 6456681 + 49252324 = 2541^2 + 7018^2 .

It is not a de Polignac number, because 55709005 - 2⁵ = 55708973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55709009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72825 + ... + 73585.

It is an arithmetic number, because the mean of its divisors is an integer number (3681603).

Almost surely, 2^55709005 is an apocalyptic number.

55709005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55709005 is a deficient number, since it is larger than the sum of its proper divisors (17923055).

55709005 is an frugal number, since it uses more digits than its factorization.

55709005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 7875, while the sum is 31.

The square root of 55709005 is about 7463.8465284329. The cubic root of 55709005 is about 381.9224027576.

The spelling of 55709005 in words is "fifty-five million, seven hundred nine thousand, five".