135620987 has 2 divisors, whose sum is σ = 135620988. Its totient is φ = 135620986.

The previous prime is 135620983. The next prime is 135621037. The reversal of 135620987 is 789026531.

135620987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135620987 - 2² = 135620983 is a prime.

It is a super-2 number, since 2×135620987² = 36786104229708338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135620983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67810493 + 67810494.

It is an arithmetic number, because the mean of its divisors is an integer number (67810494).

Almost surely, 2^135620987 is an apocalyptic number.

135620987 is a deficient number, since it is larger than the sum of its proper divisors (1).

135620987 is an equidigital number, since it uses as much as digits as its factorization.

135620987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 135620987 is about 11645.6424039209. The cubic root of 135620987 is about 513.7781534922.

The spelling of 135620987 in words is "one hundred thirty-five million, six hundred twenty thousand, nine hundred eighty-seven".