689941242 has 12 divisors (see below), whose sum is σ = 1494872730. Its totient is φ = 229980408.

The previous prime is 689941229. The next prime is 689941279. The reversal of 689941242 is 242149986.

It can be written as a sum of positive squares in only one way, i.e., 643687641 + 46253601 = 25371^2 + 6801^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19165017 + ... + 19165052.

Almost surely, 2^689941242 is an apocalyptic number.

689941242 is an abundant number, since it is smaller than the sum of its proper divisors (804931488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689941242 is a wasteful number, since it uses less digits than its factorization.

689941242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38330077 (or 38330074 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 689941242 is about 26266.7326099003. The cubic root of 689941242 is about 883.6305085161.

The spelling of 689941242 in words is "six hundred eighty-nine million, nine hundred forty-one thousand, two hundred forty-two".