135698999 has 2 divisors, whose sum is σ = 135699000. Its totient is φ = 135698998.

The previous prime is 135698987. The next prime is 135699001. The reversal of 135698999 is 999896531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135698999 is a prime.

It is a super-3 number, since 3×135698999³ (a number of 25 digits) contains 333 as substring.

Together with 135699001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135698599) 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, 67849499 + 67849500.

It is an arithmetic number, because the mean of its divisors is an integer number (67849500).

Almost surely, 2^135698999 is an apocalyptic number.

135698999 is a deficient number, since it is larger than the sum of its proper divisors (1).

135698999 is an equidigital number, since it uses as much as digits as its factorization.

135698999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4723920, while the sum is 59.

The square root of 135698999 is about 11648.9913297246. The cubic root of 135698999 is about 513.8766465537.

The spelling of 135698999 in words is "one hundred thirty-five million, six hundred ninety-eight thousand, nine hundred ninety-nine".