655390939 has 16 divisors (see below), whose sum is σ = 764064000. Its totient is φ = 550538784.

The previous prime is 655390937. The next prime is 655390963. The reversal of 655390939 is 939093556.

655390939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 655390939 - 2¹ = 655390937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655390892 and 655390901.

It is not an unprimeable number, because it can be changed into a prime (655390937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141864 + ... + 146410.

It is an arithmetic number, because the mean of its divisors is an integer number (47754000).

Almost surely, 2^655390939 is an apocalyptic number.

655390939 is a deficient number, since it is larger than the sum of its proper divisors (108673061).

655390939 is a wasteful number, since it uses less digits than its factorization.

655390939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962.

The product of its (nonzero) digits is 984150, while the sum is 49.

The square root of 655390939 is about 25600.6042702121. The cubic root of 655390939 is about 868.6273059375.

The spelling of 655390939 in words is "six hundred fifty-five million, three hundred ninety thousand, nine hundred thirty-nine".