655970591 has 8 divisors (see below), whose sum is σ = 660960000. Its totient is φ = 650997760.

The previous prime is 655970569. The next prime is 655970617. The reversal of 655970591 is 195079556.

655970591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 655970591 - 2⁶ = 655970527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655970531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81935 + ... + 89583.

It is an arithmetic number, because the mean of its divisors is an integer number (82620000).

Almost surely, 2^655970591 is an apocalyptic number.

655970591 is a deficient number, since it is larger than the sum of its proper divisors (4989409).

655970591 is a wasteful number, since it uses less digits than its factorization.

655970591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8289.

The product of its (nonzero) digits is 425250, while the sum is 47.

The square root of 655970591 is about 25611.9228290263. The cubic root of 655970591 is about 868.8833125231.

The spelling of 655970591 in words is "six hundred fifty-five million, nine hundred seventy thousand, five hundred ninety-one".