1688441253 has 8 divisors (see below), whose sum is σ = 2258448768. Its totient is φ = 1122030624.

The previous prime is 1688441243. The next prime is 1688441281. The reversal of 1688441253 is 3521448861.

It is a happy number.

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

It is not a de Polignac number, because 1688441253 - 2⁶ = 1688441189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688441203) 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, 898125 + ... + 900002.

It is an arithmetic number, because the mean of its divisors is an integer number (282306096).

Almost surely, 2^1688441253 is an apocalyptic number.

It is an amenable number.

1688441253 is a deficient number, since it is larger than the sum of its proper divisors (570007515).

1688441253 is a wasteful number, since it uses less digits than its factorization.

1688441253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798443.

The product of its digits is 184320, while the sum is 42.

The square root of 1688441253 is about 41090.6467824492. The cubic root of 1688441253 is about 1190.7721027965.

The spelling of 1688441253 in words is "one billion, six hundred eighty-eight million, four hundred forty-one thousand, two hundred fifty-three".