655953901 has 4 divisors (see below), whose sum is σ = 656013600. Its totient is φ = 655894204.

The previous prime is 655953869. The next prime is 655953937. The reversal of 655953901 is 109359556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 655953901 - 2⁵ = 655953869 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 (655953971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8071 + ... + 37108.

It is an arithmetic number, because the mean of its divisors is an integer number (164003400).

Almost surely, 2^655953901 is an apocalyptic number.

It is an amenable number.

655953901 is a deficient number, since it is larger than the sum of its proper divisors (59699).

655953901 is a wasteful number, since it uses less digits than its factorization.

655953901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59698.

The product of its (nonzero) digits is 182250, while the sum is 43.

The square root of 655953901 is about 25611.5970021395. The cubic root of 655953901 is about 868.8759433993.

It can be divided in two parts, 65595 and 3901, that added together give a palindrome (69496).

The spelling of 655953901 in words is "six hundred fifty-five million, nine hundred fifty-three thousand, nine hundred one".