689879253 has 8 divisors (see below), whose sum is σ = 1051244608. Its totient is φ = 394216704.

The previous prime is 689879249. The next prime is 689879263. The reversal of 689879253 is 352978986.

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

It is not a de Polignac number, because 689879253 - 2² = 689879249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 689879193 and 689879202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689879233) 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, 16425676 + ... + 16425717.

It is an arithmetic number, because the mean of its divisors is an integer number (131405576).

Almost surely, 2^689879253 is an apocalyptic number.

It is an amenable number.

689879253 is a deficient number, since it is larger than the sum of its proper divisors (361365355).

689879253 is a wasteful number, since it uses less digits than its factorization.

689879253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32851403.

The product of its digits is 6531840, while the sum is 57.

The square root of 689879253 is about 26265.5525927021. The cubic root of 689879253 is about 883.6040439378.

The spelling of 689879253 in words is "six hundred eighty-nine million, eight hundred seventy-nine thousand, two hundred fifty-three".