689612919 has 16 divisors (see below), whose sum is σ = 945421152. Its totient is φ = 446802048.

The previous prime is 689612909. The next prime is 689612929. The reversal of 689612919 is 919216986.

689612919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (689612909) and next prime (689612929).

It is not a de Polignac number, because 689612919 - 2²³ = 681224311 is a prime.

It is a super-2 number, since 2×689612919² = 951131956103401122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689612909) 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, 109377 + ... + 115509.

It is an arithmetic number, because the mean of its divisors is an integer number (59088822).

Almost surely, 2^689612919 is an apocalyptic number.

689612919 is a deficient number, since it is larger than the sum of its proper divisors (255808233).

689612919 is a wasteful number, since it uses less digits than its factorization.

689612919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186.

The product of its digits is 419904, while the sum is 51.

The square root of 689612919 is about 26260.4820785910. The cubic root of 689612919 is about 883.4903215778.

The spelling of 689612919 in words is "six hundred eighty-nine million, six hundred twelve thousand, nine hundred nineteen".