689210399 has 4 divisors (see below), whose sum is σ = 690895920. Its totient is φ = 687524880.

The previous prime is 689210371. The next prime is 689210411. The reversal of 689210399 is 993012986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 689210399 - 2¹² = 689206303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689210309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842147 + ... + 842964.

It is an arithmetic number, because the mean of its divisors is an integer number (172723980).

Almost surely, 2^689210399 is an apocalyptic number.

689210399 is a deficient number, since it is larger than the sum of its proper divisors (1685521).

689210399 is a wasteful number, since it uses less digits than its factorization.

689210399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685520.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 689210399 is about 26252.8169726603. The cubic root of 689210399 is about 883.3183933710.

The spelling of 689210399 in words is "six hundred eighty-nine million, two hundred ten thousand, three hundred ninety-nine".