689221497 has 16 divisors (see below), whose sum is σ = 981953280. Its totient is φ = 428481792.

The previous prime is 689221471. The next prime is 689221499. The reversal of 689221497 is 794122986.

It is not a de Polignac number, because 689221497 - 2¹² = 689217401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689221499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56433 + ... + 67550.

It is an arithmetic number, because the mean of its divisors is an integer number (61372080).

Almost surely, 2^689221497 is an apocalyptic number.

It is an amenable number.

689221497 is a deficient number, since it is larger than the sum of its proper divisors (292731783).

689221497 is a wasteful number, since it uses less digits than its factorization.

689221497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124112.

The product of its digits is 435456, while the sum is 48.

The square root of 689221497 is about 26253.0283396030. The cubic root of 689221497 is about 883.3231345526.

The spelling of 689221497 in words is "six hundred eighty-nine million, two hundred twenty-one thousand, four hundred ninety-seven".