55923869 has 2 divisors, whose sum is σ = 55923870. Its totient is φ = 55923868.

The previous prime is 55923841. The next prime is 55923883. The reversal of 55923869 is 96832955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 5938969 = 7070^2 + 2437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55923869 is a prime.

It is a super-2 number, since 2×55923869² = 6254958247858322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55923269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27961934 + 27961935.

It is an arithmetic number, because the mean of its divisors is an integer number (27961935).

Almost surely, 2^55923869 is an apocalyptic number.

It is an amenable number.

55923869 is a deficient number, since it is larger than the sum of its proper divisors (1).

55923869 is an equidigital number, since it uses as much as digits as its factorization.

55923869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The square root of 55923869 is about 7478.2263271447. The cubic root of 55923869 is about 382.4127848770.

The spelling of 55923869 in words is "fifty-five million, nine hundred twenty-three thousand, eight hundred sixty-nine".