135899677 has 2 divisors, whose sum is σ = 135899678. Its totient is φ = 135899676.

The previous prime is 135899653. The next prime is 135899681. The reversal of 135899677 is 776998531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124970041 + 10929636 = 11179^2 + 3306^2 .

It is a cyclic number.

It is not a de Polignac number, because 135899677 - 2⁷ = 135899549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135891677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67949838 + 67949839.

It is an arithmetic number, because the mean of its divisors is an integer number (67949839).

Almost surely, 2^135899677 is an apocalyptic number.

It is an amenable number.

135899677 is a deficient number, since it is larger than the sum of its proper divisors (1).

135899677 is an equidigital number, since it uses as much as digits as its factorization.

135899677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 55.

The square root of 135899677 is about 11657.6016830221. The cubic root of 135899677 is about 514.1298366912.

The spelling of 135899677 in words is "one hundred thirty-five million, eight hundred ninety-nine thousand, six hundred seventy-seven".