135931665 has 8 divisors (see below), whose sum is σ = 217490688. Its totient is φ = 72496880.

The previous prime is 135931619. The next prime is 135931667. The reversal of 135931665 is 566139531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135931665 - 2¹¹ = 135929617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135931667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4531041 + ... + 4531070.

It is an arithmetic number, because the mean of its divisors is an integer number (27186336).

Almost surely, 2^135931665 is an apocalyptic number.

135931665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135931665 is a deficient number, since it is larger than the sum of its proper divisors (81559023).

135931665 is an equidigital number, since it uses as much as digits as its factorization.

135931665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9062119.

The product of its digits is 72900, while the sum is 39.

The square root of 135931665 is about 11658.9735826101. The cubic root of 135931665 is about 514.1701720705.

The spelling of 135931665 in words is "one hundred thirty-five million, nine hundred thirty-one thousand, six hundred sixty-five".