655623399 has 8 divisors (see below), whose sum is σ = 888981120. Its totient is φ = 429673976.

The previous prime is 655623359. The next prime is 655623413. The reversal of 655623399 is 993326556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655623399 - 2¹⁹ = 655099111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655623359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851867 + ... + 1852220.

It is an arithmetic number, because the mean of its divisors is an integer number (111122640).

Almost surely, 2^655623399 is an apocalyptic number.

655623399 is a deficient number, since it is larger than the sum of its proper divisors (233357721).

655623399 is a wasteful number, since it uses less digits than its factorization.

655623399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704149.

The product of its digits is 1312200, while the sum is 48.

The square root of 655623399 is about 25605.1439949085. The cubic root of 655623399 is about 868.7299913339.

The spelling of 655623399 in words is "six hundred fifty-five million, six hundred twenty-three thousand, three hundred ninety-nine".