1356669889 has 3 divisors (see below), whose sum is σ = 1356706723. Its totient is φ = 1356633056.

The previous prime is 1356669871. The next prime is 1356669893. The reversal of 1356669889 is 9889666531.

The square root of 1356669889 is 36833.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9889666531 = 31 ⋅319021501.

It can be written as a sum of positive squares in only one way, i.e., 16524225 + 1340145664 = 4065^2 + 36608^2 .

It is not a de Polignac number, because 1356669889 - 2⁵ = 1356669857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356669859) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18417 + ... + 55249.

Almost surely, 2^1356669889 is an apocalyptic number.

1356669889 is the 36833-rd square number.

1356669889 is the 18417-th centered octagonal number.

It is an amenable number.

1356669889 is a deficient number, since it is larger than the sum of its proper divisors (36834).

1356669889 is an frugal number, since it uses more digits than its factorization.

1356669889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73666 (or 36833 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 61.

The cubic root of 1356669889 is about 1107.0266143668.

The spelling of 1356669889 in words is "one billion, three hundred fifty-six million, six hundred sixty-nine thousand, eight hundred eighty-nine".