655962989 has 4 divisors (see below), whose sum is σ = 715596000. Its totient is φ = 596329980.

The previous prime is 655962953. The next prime is 655962997. The reversal of 655962989 is 989269556.

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.

It is a cyclic number.

It is not a de Polignac number, because 655962989 - 2⁸ = 655962733 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 (655962089) 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, 29816489 + ... + 29816510.

It is an arithmetic number, because the mean of its divisors is an integer number (178899000).

Almost surely, 2^655962989 is an apocalyptic number.

It is an amenable number.

655962989 is a deficient number, since it is larger than the sum of its proper divisors (59633011).

655962989 is a wasteful number, since it uses less digits than its factorization.

655962989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59633010.

The product of its digits is 10497600, while the sum is 59.

The square root of 655962989 is about 25611.7744211525. The cubic root of 655962989 is about 868.8799560330.

The spelling of 655962989 in words is "six hundred fifty-five million, nine hundred sixty-two thousand, nine hundred eighty-nine".