135668977 has 2 divisors, whose sum is σ = 135668978. Its totient is φ = 135668976.

The previous prime is 135668917. The next prime is 135668983. The reversal of 135668977 is 779866531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122412096 + 13256881 = 11064^2 + 3641^2 .

It is a cyclic number.

It is not a de Polignac number, because 135668977 - 2¹¹ = 135666929 is a prime.

It is not a weakly prime, because it can be changed into another prime (135668917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67834488 + 67834489.

It is an arithmetic number, because the mean of its divisors is an integer number (67834489).

Almost surely, 2^135668977 is an apocalyptic number.

It is an amenable number.

135668977 is a deficient number, since it is larger than the sum of its proper divisors (1).

135668977 is an equidigital number, since it uses as much as digits as its factorization.

135668977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 135668977 is about 11647.7026490205. The cubic root of 135668977 is about 513.8387471276.

The spelling of 135668977 in words is "one hundred thirty-five million, six hundred sixty-eight thousand, nine hundred seventy-seven".