689117051 has 4 divisors (see below), whose sum is σ = 787562352. Its totient is φ = 590671752.

The previous prime is 689117029. The next prime is 689117059. The reversal of 689117051 is 150711986.

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 689117051 - 2¹⁰ = 689116027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689116996 and 689117014.

It is not an unprimeable number, because it can be changed into a prime (689117059) 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, 49222640 + ... + 49222653.

It is an arithmetic number, because the mean of its divisors is an integer number (196890588).

Almost surely, 2^689117051 is an apocalyptic number.

689117051 is a deficient number, since it is larger than the sum of its proper divisors (98445301).

689117051 is an equidigital number, since it uses as much as digits as its factorization.

689117051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98445300.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 689117051 is about 26251.0390461025. The cubic root of 689117051 is about 883.2785121154.

It can be divided in two parts, 68 and 9117051, that added together give a palindrome (9117119).

The spelling of 689117051 in words is "six hundred eighty-nine million, one hundred seventeen thousand, fifty-one".