135689399 has 2 divisors, whose sum is σ = 135689400. Its totient is φ = 135689398.

The previous prime is 135689371. The next prime is 135689447. The reversal of 135689399 is 993986531.

135689399 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 135689399 - 2¹⁶ = 135623863 is a prime.

It is a super-2 number, since 2×135689399² = 36823226001962402, which contains 22 as substring.

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 135689399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135689369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67844699 + 67844700.

It is an arithmetic number, because the mean of its divisors is an integer number (67844700).

Almost surely, 2^135689399 is an apocalyptic number.

135689399 is a deficient number, since it is larger than the sum of its proper divisors (1).

135689399 is an equidigital number, since it uses as much as digits as its factorization.

135689399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 135689399 is about 11648.5792695934. The cubic root of 135689399 is about 513.8645282325.

The spelling of 135689399 in words is "one hundred thirty-five million, six hundred eighty-nine thousand, three hundred ninety-nine".