55009873 has 2 divisors, whose sum is σ = 55009874. Its totient is φ = 55009872.

The previous prime is 55009853. The next prime is 55009891. The reversal of 55009873 is 37890055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27636049 + 27373824 = 5257^2 + 5232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55009873 is a prime.

It is a super-2 number, since 2×55009873² = 6052172254952258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55009853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27504936 + 27504937.

It is an arithmetic number, because the mean of its divisors is an integer number (27504937).

Almost surely, 2^55009873 is an apocalyptic number.

It is an amenable number.

55009873 is a deficient number, since it is larger than the sum of its proper divisors (1).

55009873 is an equidigital number, since it uses as much as digits as its factorization.

55009873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 55009873 is about 7416.8640947506. The cubic root of 55009873 is about 380.3180001993.

The spelling of 55009873 in words is "fifty-five million, nine thousand, eight hundred seventy-three".