135688507 has 2 divisors, whose sum is σ = 135688508. Its totient is φ = 135688506.

The previous prime is 135688463. The next prime is 135688517. The reversal of 135688507 is 705886531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135688507 - 2⁷ = 135688379 is a prime.

It is a super-2 number, since 2×135688507² = 36822741863778098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135688517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67844253 + 67844254.

It is an arithmetic number, because the mean of its divisors is an integer number (67844254).

Almost surely, 2^135688507 is an apocalyptic number.

135688507 is a deficient number, since it is larger than the sum of its proper divisors (1).

135688507 is an equidigital number, since it uses as much as digits as its factorization.

135688507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 135688507 is about 11648.5409815994. The cubic root of 135688507 is about 513.8634022095.

The spelling of 135688507 in words is "one hundred thirty-five million, six hundred eighty-eight thousand, five hundred seven".