1646714689 has 4 divisors (see below), whose sum is σ = 1656575424. Its totient is φ = 1636853956.

The previous prime is 1646714669. The next prime is 1646714723. The reversal of 1646714689 is 9864176461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1646714689 - 2²¹ = 1644617537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646714609) 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, 4930117 + ... + 4930450.

It is an arithmetic number, because the mean of its divisors is an integer number (414143856).

Almost surely, 2^1646714689 is an apocalyptic number.

It is an amenable number.

1646714689 is a deficient number, since it is larger than the sum of its proper divisors (9860735).

1646714689 is an equidigital number, since it uses as much as digits as its factorization.

1646714689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9860734.

The product of its digits is 1741824, while the sum is 52.

The square root of 1646714689 is about 40579.7324904933. The cubic root of 1646714689 is about 1180.8809587675.

The spelling of 1646714689 in words is "one billion, six hundred forty-six million, seven hundred fourteen thousand, six hundred eighty-nine".