689958937 has 4 divisors (see below), whose sum is σ = 690192000. Its totient is φ = 689725876.

The previous prime is 689958931. The next prime is 689958959. The reversal of 689958937 is 739859986.

It is a happy number.

689958937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 739859986 = 2 ⋅369929993.

It is a cyclic number.

It is not a de Polignac number, because 689958937 - 2¹⁵ = 689926169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689958931) 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, 112033 + ... + 118030.

It is an arithmetic number, because the mean of its divisors is an integer number (172548000).

Almost surely, 2^689958937 is an apocalyptic number.

It is an amenable number.

689958937 is a deficient number, since it is larger than the sum of its proper divisors (233063).

689958937 is a wasteful number, since it uses less digits than its factorization.

689958937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233062.

The product of its digits is 29393280, while the sum is 64.

The square root of 689958937 is about 26267.0694406513. The cubic root of 689958937 is about 883.6380626416.

The spelling of 689958937 in words is "six hundred eighty-nine million, nine hundred fifty-eight thousand, nine hundred thirty-seven".