136988387 has 2 divisors, whose sum is σ = 136988388. Its totient is φ = 136988386.

The previous prime is 136988381. The next prime is 136988399. The reversal of 136988387 is 783889631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136988387 - 2¹² = 136984291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136988381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68494193 + 68494194.

It is an arithmetic number, because the mean of its divisors is an integer number (68494194).

Almost surely, 2^136988387 is an apocalyptic number.

136988387 is a deficient number, since it is larger than the sum of its proper divisors (1).

136988387 is an equidigital number, since it uses as much as digits as its factorization.

136988387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 136988387 is about 11704.2038174324. The cubic root of 136988387 is about 515.4991070526.

The spelling of 136988387 in words is "one hundred thirty-six million, nine hundred eighty-eight thousand, three hundred eighty-seven".