1136399389 has 8 divisors (see below), whose sum is σ = 1167983960. Its totient is φ = 1104860736.

The previous prime is 1136399371. The next prime is 1136399393. The reversal of 1136399389 is 9839936311.

It can be written as a sum of positive squares in 4 ways, for example, as 15288100 + 1121111289 = 3910^2 + 33483^2 .

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 1136399389 - 2¹¹ = 1136397341 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 (1136399339) 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, 42127 + ... + 63619.

It is an arithmetic number, because the mean of its divisors is an integer number (145997995).

Almost surely, 2^1136399389 is an apocalyptic number.

It is an amenable number.

1136399389 is a deficient number, since it is larger than the sum of its proper divisors (31584571).

1136399389 is a wasteful number, since it uses less digits than its factorization.

1136399389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22959.

The product of its digits is 944784, while the sum is 52.

The square root of 1136399389 is about 33710.5234162865. The cubic root of 1136399389 is about 1043.5429550762.

The spelling of 1136399389 in words is "one billion, one hundred thirty-six million, three hundred ninety-nine thousand, three hundred eighty-nine".