55776823 has 2 divisors, whose sum is σ = 55776824. Its totient is φ = 55776822.

The previous prime is 55776821. The next prime is 55776839. The reversal of 55776823 is 32867755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55776823 - 2¹ = 55776821 is a prime.

It is a super-2 number, since 2×55776823² = 6222107967946658, which contains 22 as substring.

Together with 55776821, 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 55776823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55776821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27888411 + 27888412.

It is an arithmetic number, because the mean of its divisors is an integer number (27888412).

Almost surely, 2^55776823 is an apocalyptic number.

55776823 is a deficient number, since it is larger than the sum of its proper divisors (1).

55776823 is an equidigital number, since it uses as much as digits as its factorization.

55776823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 43.

The square root of 55776823 is about 7468.3882464692. The cubic root of 55776823 is about 382.0773191261.

The spelling of 55776823 in words is "fifty-five million, seven hundred seventy-six thousand, eight hundred twenty-three".