689251297 has 16 divisors (see below), whose sum is σ = 810950400. Its totient is φ = 585525696.

The previous prime is 689251267. The next prime is 689251301. The reversal of 689251297 is 792152986.

It is not a de Polignac number, because 689251297 - 2¹⁹ = 688727009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689251297.

It is not an unprimeable number, because it can be changed into a prime (689251217) 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 15 ways as a sum of consecutive naturals, for example, 29868 + ... + 47650.

It is an arithmetic number, because the mean of its divisors is an integer number (50684400).

Almost surely, 2^689251297 is an apocalyptic number.

It is an amenable number.

689251297 is a deficient number, since it is larger than the sum of its proper divisors (121699103).

689251297 is a wasteful number, since it uses less digits than its factorization.

689251297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17917 (or 17903 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 689251297 is about 26253.5958870399. The cubic root of 689251297 is about 883.3358651721.

The spelling of 689251297 in words is "six hundred eighty-nine million, two hundred fifty-one thousand, two hundred ninety-seven".