1138917589 has 8 divisors (see below), whose sum is σ = 1199294240. Its totient is φ = 1078584336.

The previous prime is 1138917547. The next prime is 1138917613. The reversal of 1138917589 is 9857198311.

It is a happy number.

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 1138917589 - 2¹⁵ = 1138884821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138917509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52594 + ... + 71020.

It is an arithmetic number, because the mean of its divisors is an integer number (149911780).

Almost surely, 2^1138917589 is an apocalyptic number.

1138917589 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1138917589 is a deficient number, since it is larger than the sum of its proper divisors (60376651).

1138917589 is a wasteful number, since it uses less digits than its factorization.

1138917589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21699.

The product of its digits is 544320, while the sum is 52.

The square root of 1138917589 is about 33747.8531020864. The cubic root of 1138917589 is about 1044.3131981272.

The spelling of 1138917589 in words is "one billion, one hundred thirty-eight million, nine hundred seventeen thousand, five hundred eighty-nine".