689223731 has 16 divisors (see below), whose sum is σ = 793387008. Its totient is φ = 586504800.

The previous prime is 689223709. The next prime is 689223749. The reversal of 689223731 is 137322986.

It is not a de Polignac number, because 689223731 - 2¹⁴ = 689207347 is a prime.

It is a super-2 number, since 2×689223731² = 950058702747120722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689223761) 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, 798206 + ... + 799068.

It is an arithmetic number, because the mean of its divisors is an integer number (49586688).

Almost surely, 2^689223731 is an apocalyptic number.

689223731 is a deficient number, since it is larger than the sum of its proper divisors (104163277).

689223731 is a wasteful number, since it uses less digits than its factorization.

689223731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562.

The product of its digits is 108864, while the sum is 41.

The square root of 689223731 is about 26253.0708870410. The cubic root of 689223731 is about 883.3240889345.

The spelling of 689223731 in words is "six hundred eighty-nine million, two hundred twenty-three thousand, seven hundred thirty-one".