1136238889 has 2 divisors, whose sum is σ = 1136238890. Its totient is φ = 1136238888.

The previous prime is 1136238841. The next prime is 1136238947. The reversal of 1136238889 is 9888326311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 932691600 + 203547289 = 30540^2 + 14267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1136238889 - 2²¹ = 1134141737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1136238989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568119444 + 568119445.

It is an arithmetic number, because the mean of its divisors is an integer number (568119445).

Almost surely, 2^1136238889 is an apocalyptic number.

It is an amenable number.

1136238889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136238889 is an equidigital number, since it uses as much as digits as its factorization.

1136238889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 1136238889 is about 33708.1427699599. The cubic root of 1136238889 is about 1043.4938243065.

The spelling of 1136238889 in words is "one billion, one hundred thirty-six million, two hundred thirty-eight thousand, eight hundred eighty-nine".