135143777 has 2 divisors, whose sum is σ = 135143778. Its totient is φ = 135143776.

The previous prime is 135143651. The next prime is 135143779. The reversal of 135143777 is 777341531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80442961 + 54700816 = 8969^2 + 7396^2 .

It is an emirp because it is prime and its reverse (777341531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135143777 - 2⁸ = 135143521 is a prime.

Together with 135143779, it forms a pair of twin primes.

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 135143777.

It is not a weakly prime, because it can be changed into another prime (135143779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67571888 + 67571889.

It is an arithmetic number, because the mean of its divisors is an integer number (67571889).

Almost surely, 2^135143777 is an apocalyptic number.

It is an amenable number.

135143777 is a deficient number, since it is larger than the sum of its proper divisors (1).

135143777 is an equidigital number, since it uses as much as digits as its factorization.

135143777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 38.

The square root of 135143777 is about 11625.1355691020. The cubic root of 135143777 is about 513.1748343611.

The spelling of 135143777 in words is "one hundred thirty-five million, one hundred forty-three thousand, seven hundred seventy-seven".