135717918 has 16 divisors (see below), whose sum is σ = 310212480. Its totient is φ = 38776536.

The previous prime is 135717899. The next prime is 135717937. The reversal of 135717918 is 819717531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (135717899) and next prime (135717937).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3231379 = 135717918 / (1 + 3 + 5 + 7 + 1 + 7 + 9 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 135717918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1615648 + ... + 1615731.

It is an arithmetic number, because the mean of its divisors is an integer number (19388280).

Almost surely, 2^135717918 is an apocalyptic number.

135717918 is an abundant number, since it is smaller than the sum of its proper divisors (174494562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135717918 is a wasteful number, since it uses less digits than its factorization.

135717918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231391.

The product of its digits is 52920, while the sum is 42.

The square root of 135717918 is about 11649.8033459797. The cubic root of 135717918 is about 513.9005268097.

The spelling of 135717918 in words is "one hundred thirty-five million, seven hundred seventeen thousand, nine hundred eighteen".