1381532689 has 8 divisors (see below), whose sum is σ = 1394621280. Its totient is φ = 1368459456.

The previous prime is 1381532657. The next prime is 1381532699. The reversal of 1381532689 is 9862351831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381532689 - 2⁵ = 1381532657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381532699) 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, 261694 + ... + 266920.

It is an arithmetic number, because the mean of its divisors is an integer number (174327660).

Almost surely, 2^1381532689 is an apocalyptic number.

It is an amenable number.

1381532689 is a deficient number, since it is larger than the sum of its proper divisors (13088591).

1381532689 is a wasteful number, since it uses less digits than its factorization.

1381532689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679.

The product of its digits is 311040, while the sum is 46.

The square root of 1381532689 is about 37168.9748177159. The cubic root of 1381532689 is about 1113.7483025180.

The spelling of 1381532689 in words is "one billion, three hundred eighty-one million, five hundred thirty-two thousand, six hundred eighty-nine".