135291965 has 4 divisors (see below), whose sum is σ = 162350364. Its totient is φ = 108233568.

The previous prime is 135291907. The next prime is 135291973. The reversal of 135291965 is 569192531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569192531 = 20753 ⋅27427.

It can be written as a sum of positive squares in 2 ways, for example, as 31516996 + 103774969 = 5614^2 + 10187^2 .

It is a cyclic number.

It is not a de Polignac number, because 135291965 - 2⁶ = 135291901 is a prime.

It is a super-2 number, since 2×135291965² = 36607831587122450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13529192 + ... + 13529201.

It is an arithmetic number, because the mean of its divisors is an integer number (40587591).

Almost surely, 2^135291965 is an apocalyptic number.

It is an amenable number.

135291965 is a deficient number, since it is larger than the sum of its proper divisors (27058399).

135291965 is an equidigital number, since it uses as much as digits as its factorization.

135291965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27058398.

The product of its digits is 72900, while the sum is 41.

The square root of 135291965 is about 11631.5074259530. The cubic root of 135291965 is about 513.3623348526.

The spelling of 135291965 in words is "one hundred thirty-five million, two hundred ninety-one thousand, nine hundred sixty-five".