689351081 has 8 divisors (see below), whose sum is σ = 707392224. Its totient is φ = 671368480.

The previous prime is 689351063. The next prime is 689351099. The reversal of 689351081 is 180153986.

It is an interprime number because it is at equal distance from previous prime (689351063) and next prime (689351099).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689351081 - 2¹⁴ = 689334697 is a prime.

It is a super-2 number, since 2×689351081² = 950409825751737122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689351041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9746 + ... + 38388.

It is an arithmetic number, because the mean of its divisors is an integer number (88424028).

Almost surely, 2^689351081 is an apocalyptic number.

It is an amenable number.

689351081 is a deficient number, since it is larger than the sum of its proper divisors (18041143).

689351081 is a wasteful number, since it uses less digits than its factorization.

689351081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29271.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 689351081 is about 26255.4962055567. The cubic root of 689351081 is about 883.3784904251.

The spelling of 689351081 in words is "six hundred eighty-nine million, three hundred fifty-one thousand, eighty-one".