689480051 has 4 divisors (see below), whose sum is σ = 742516992. Its totient is φ = 636443112.

The previous prime is 689479991. The next prime is 689480053. The reversal of 689480051 is 150084986.

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 689480051 - 2²⁶ = 622371187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689479990 and 689480008.

It is not an unprimeable number, because it can be changed into a prime (689480053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26518451 + ... + 26518476.

It is an arithmetic number, because the mean of its divisors is an integer number (185629248).

Almost surely, 2^689480051 is an apocalyptic number.

689480051 is a deficient number, since it is larger than the sum of its proper divisors (53036941).

689480051 is a wasteful number, since it uses less digits than its factorization.

689480051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53036940.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 689480051 is about 26257.9521478732. The cubic root of 689480051 is about 883.4335771208.

The spelling of 689480051 in words is "six hundred eighty-nine million, four hundred eighty thousand, fifty-one".