1682643653 has 4 divisors (see below), whose sum is σ = 1683187980. Its totient is φ = 1682099328.

The previous prime is 1682643619. The next prime is 1682643659. The reversal of 1682643653 is 3563462861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 816930724 + 865712929 = 28582^2 + 29423^2 .

It is a cyclic number.

It is not a de Polignac number, because 1682643653 - 2²⁸ = 1414208197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1682643659) 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, 267500 + ... + 273717.

It is an arithmetic number, because the mean of its divisors is an integer number (420796995).

Almost surely, 2^1682643653 is an apocalyptic number.

It is an amenable number.

1682643653 is a deficient number, since it is larger than the sum of its proper divisors (544327).

1682643653 is an equidigital number, since it uses as much as digits as its factorization.

1682643653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544326.

The product of its digits is 622080, while the sum is 44.

The square root of 1682643653 is about 41020.0396513704. The cubic root of 1682643653 is about 1189.4076219789.

The spelling of 1682643653 in words is "one billion, six hundred eighty-two million, six hundred forty-three thousand, six hundred fifty-three".