136885387 has 2 divisors, whose sum is σ = 136885388. Its totient is φ = 136885386.

The previous prime is 136885321. The next prime is 136885409. The reversal of 136885387 is 783588631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136885387 - 2¹⁵ = 136852619 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136885387.

It is not a weakly prime, because it can be changed into another prime (136885687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68442693 + 68442694.

It is an arithmetic number, because the mean of its divisors is an integer number (68442694).

Almost surely, 2^136885387 is an apocalyptic number.

136885387 is a deficient number, since it is larger than the sum of its proper divisors (1).

136885387 is an equidigital number, since it uses as much as digits as its factorization.

136885387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The square root of 136885387 is about 11699.8028615870. The cubic root of 136885387 is about 515.3698753654.

The spelling of 136885387 in words is "one hundred thirty-six million, eight hundred eighty-five thousand, three hundred eighty-seven".