55123069 has 2 divisors, whose sum is σ = 55123070. Its totient is φ = 55123068.

The previous prime is 55123067. The next prime is 55123087. The reversal of 55123069 is 96032155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 879844 = 7365^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 55123069 - 2¹ = 55123067 is a prime.

It is a super-2 number, since 2×55123069² = 6077105471957522, which contains 22 as substring.

Together with 55123067, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55123069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55123067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27561534 + 27561535.

It is an arithmetic number, because the mean of its divisors is an integer number (27561535).

Almost surely, 2^55123069 is an apocalyptic number.

It is an amenable number.

55123069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55123069 is an equidigital number, since it uses as much as digits as its factorization.

55123069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 55123069 is about 7424.4911610157. The cubic root of 55123069 is about 380.5786866229.

The spelling of 55123069 in words is "fifty-five million, one hundred twenty-three thousand, sixty-nine".