55000069 has 2 divisors, whose sum is σ = 55000070. Its totient is φ = 55000068.

The previous prime is 55000031. The next prime is 55000091. The reversal of 55000069 is 96000055.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54199044 + 801025 = 7362^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 55000069 - 2¹⁹ = 54475781 is a prime.

It is a super-2 number, since 2×55000069² = 6050015180009522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55000369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500034 + 27500035.

It is an arithmetic number, because the mean of its divisors is an integer number (27500035).

Almost surely, 2^55000069 is an apocalyptic number.

It is an amenable number.

55000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55000069 is an equidigital number, since it uses as much as digits as its factorization.

55000069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 55000069 is about 7416.2031390733. The cubic root of 55000069 is about 380.2954051086.

The spelling of 55000069 in words is "fifty-five million, sixty-nine", and thus it is an aban number and an uban number.