689040007 has 4 divisors (see below), whose sum is σ = 711267136. Its totient is φ = 666812880.

The previous prime is 689039983. The next prime is 689040013. The reversal of 689040007 is 700040986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700040986 = 2 ⋅350020493.

It is a cyclic number.

It is not a de Polignac number, because 689040007 - 2¹¹ = 689037959 is a prime.

It is a super-2 number, since 2×689040007² = 949552262493120098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689040067) 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, 11113518 + ... + 11113579.

It is an arithmetic number, because the mean of its divisors is an integer number (177816784).

Almost surely, 2^689040007 is an apocalyptic number.

689040007 is a deficient number, since it is larger than the sum of its proper divisors (22227129).

689040007 is a wasteful number, since it uses less digits than its factorization.

689040007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22227128.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 689040007 is about 26249.5715584083. The cubic root of 689040007 is about 883.2455937377.

The spelling of 689040007 in words is "six hundred eighty-nine million, forty thousand, seven".