689406219 has 24 divisors (see below), whose sum is σ = 1067751360. Its totient is φ = 427085568.

The previous prime is 689406191. The next prime is 689406239. The reversal of 689406219 is 912604986.

It is a happy number.

It is not a de Polignac number, because 689406219 - 2⁸ = 689405963 is a prime.

It is a super-2 number, since 2×689406219² = 950561869591751922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689406239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16432 + ... + 40605.

It is an arithmetic number, because the mean of its divisors is an integer number (44489640).

Almost surely, 2^689406219 is an apocalyptic number.

689406219 is a deficient number, since it is larger than the sum of its proper divisors (378345141).

689406219 is a wasteful number, since it uses less digits than its factorization.

689406219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57139 (or 57136 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 689406219 is about 26256.5462123258. The cubic root of 689406219 is about 883.4020422485.

The spelling of 689406219 in words is "six hundred eighty-nine million, four hundred six thousand, two hundred nineteen".