689175641 has 12 divisors (see below), whose sum is σ = 874576080. Its totient is φ = 537019560.

The previous prime is 689175593. The next prime is 689175647. The reversal of 689175641 is 146571986.

It is a de Polignac number, because none of the positive numbers 2^k-689175641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689175647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638771 + ... + 639848.

It is an arithmetic number, because the mean of its divisors is an integer number (72881340).

Almost surely, 2^689175641 is an apocalyptic number.

It is an amenable number.

689175641 is a deficient number, since it is larger than the sum of its proper divisors (185400439).

689175641 is a wasteful number, since it uses less digits than its factorization.

689175641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278644 (or 1278637 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 689175641 is about 26252.1549782108. The cubic root of 689175641 is about 883.3035440609.

The spelling of 689175641 in words is "six hundred eighty-nine million, one hundred seventy-five thousand, six hundred forty-one".