135923367787 has 2 divisors, whose sum is σ = 135923367788. Its totient is φ = 135923367786.

The previous prime is 135923367781. The next prime is 135923367821. The reversal of 135923367787 is 787763329531.

It is a weak prime.

It is an emirp because it is prime and its reverse (787763329531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135923367787 - 2¹⁹ = 135922843499 is a prime.

It is not a weakly prime, because it can be changed into another prime (135923367781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67961683893 + 67961683894.

It is an arithmetic number, because the mean of its divisors is an integer number (67961683894).

Almost surely, 2^135923367787 is an apocalyptic number.

135923367787 is a deficient number, since it is larger than the sum of its proper divisors (1).

135923367787 is an equidigital number, since it uses as much as digits as its factorization.

135923367787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 61.

The spelling of 135923367787 in words is "one hundred thirty-five billion, nine hundred twenty-three million, three hundred sixty-seven thousand, seven hundred eighty-seven".