1136721587 has 2 divisors, whose sum is σ = 1136721588. Its totient is φ = 1136721586.

The previous prime is 1136721539. The next prime is 1136721623. The reversal of 1136721587 is 7851276311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1136721587 - 2⁸ = 1136721331 is a prime.

It is not a weakly prime, because it can be changed into another prime (1136721527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568360793 + 568360794.

It is an arithmetic number, because the mean of its divisors is an integer number (568360794).

Almost surely, 2^1136721587 is an apocalyptic number.

1136721587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136721587 is an equidigital number, since it uses as much as digits as its factorization.

1136721587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 41.

The square root of 1136721587 is about 33715.3019710635. The cubic root of 1136721587 is about 1043.6415693735.

Adding to 1136721587 its reverse (7851276311), we get a palindrome (8987997898).

The spelling of 1136721587 in words is "one billion, one hundred thirty-six million, seven hundred twenty-one thousand, five hundred eighty-seven".