689363493 has 64 divisors (see below), whose sum is σ = 1162936320. Its totient is φ = 353590272.

The previous prime is 689363489. The next prime is 689363497. The reversal of 689363493 is 394363986.

689363493 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (689363489) and next prime (689363497).

It is not a de Polignac number, because 689363493 - 2² = 689363489 is a prime.

It is a super-2 number, since 2×689363493² = 950444050962322098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689363497) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2045421 + ... + 2045757.

It is an arithmetic number, because the mean of its divisors is an integer number (18170880).

Almost surely, 2^689363493 is an apocalyptic number.

It is an amenable number.

689363493 is a deficient number, since it is larger than the sum of its proper divisors (473572827).

689363493 is a wasteful number, since it uses less digits than its factorization.

689363493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546.

The product of its digits is 2519424, while the sum is 51.

The square root of 689363493 is about 26255.7325740494. The cubic root of 689363493 is about 883.3837922364.

The spelling of 689363493 in words is "six hundred eighty-nine million, three hundred sixty-three thousand, four hundred ninety-three".