611172889 has 8 divisors (see below), whose sum is σ = 626299520. Its totient is φ = 596087856.

The previous prime is 611172841. The next prime is 611172911. The reversal of 611172889 is 988271116.

It is a happy number.

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 611172889 - 2⁹ = 611172377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611172589) 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, 20464 + ... + 40510.

It is an arithmetic number, because the mean of its divisors is an integer number (78287440).

Almost surely, 2^611172889 is an apocalyptic number.

It is an amenable number.

611172889 is a deficient number, since it is larger than the sum of its proper divisors (15126631).

611172889 is a wasteful number, since it uses less digits than its factorization.

611172889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20799.

The product of its digits is 48384, while the sum is 43.

The square root of 611172889 is about 24721.9111114008. The cubic root of 611172889 is about 848.6358228565.

The spelling of 611172889 in words is "six hundred eleven million, one hundred seventy-two thousand, eight hundred eighty-nine".