655787823 has 4 divisors (see below), whose sum is σ = 874383768. Its totient is φ = 437191880.

The previous prime is 655787809. The next prime is 655787833. The reversal of 655787823 is 328787556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655787823 - 2⁸ = 655787567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655787833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109297968 + ... + 109297973.

It is an arithmetic number, because the mean of its divisors is an integer number (218595942).

Almost surely, 2^655787823 is an apocalyptic number.

655787823 is a deficient number, since it is larger than the sum of its proper divisors (218595945).

655787823 is a wasteful number, since it uses less digits than its factorization.

655787823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218595944.

The product of its digits is 2822400, while the sum is 51.

The square root of 655787823 is about 25608.3545547151. The cubic root of 655787823 is about 868.8026082870.

The spelling of 655787823 in words is "six hundred fifty-five million, seven hundred eighty-seven thousand, eight hundred twenty-three".