1445684689 has 4 divisors (see below), whose sum is σ = 1469384500. Its totient is φ = 1421984880.

The previous prime is 1445684663. The next prime is 1445684701. The reversal of 1445684689 is 9864865441.

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 640090000 + 805594689 = 25300^2 + 28383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445684689 - 2¹³ = 1445676497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445684629) 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, 11849814 + ... + 11849935.

It is an arithmetic number, because the mean of its divisors is an integer number (367346125).

Almost surely, 2^1445684689 is an apocalyptic number.

It is an amenable number.

1445684689 is a deficient number, since it is larger than the sum of its proper divisors (23699811).

1445684689 is an equidigital number, since it uses as much as digits as its factorization.

1445684689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23699810.

The product of its digits is 6635520, while the sum is 55.

The square root of 1445684689 is about 38022.1604988459. The cubic root of 1445684689 is about 1130.7272549782.

The spelling of 1445684689 in words is "one billion, four hundred forty-five million, six hundred eighty-four thousand, six hundred eighty-nine".