1659838749 has 8 divisors (see below), whose sum is σ = 2213404512. Its totient is φ = 1106416080.

The previous prime is 1659838709. The next prime is 1659838777. The reversal of 1659838749 is 9478389561.

1659838749 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1659838749 - 2²⁹ = 1122967837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1659838692 and 1659838701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659838709) 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, 4899 + ... + 57824.

It is an arithmetic number, because the mean of its divisors is an integer number (276675564).

Almost surely, 2^1659838749 is an apocalyptic number.

It is an amenable number.

1659838749 is a deficient number, since it is larger than the sum of its proper divisors (553565763).

1659838749 is an equidigital number, since it uses as much as digits as its factorization.

1659838749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71547.

The product of its digits is 13063680, while the sum is 60.

The square root of 1659838749 is about 40741.1186517994. The cubic root of 1659838749 is about 1184.0098071553.

The spelling of 1659838749 in words is "one billion, six hundred fifty-nine million, eight hundred thirty-eight thousand, seven hundred forty-nine".