135807619 has 4 divisors (see below), whose sum is σ = 135838144. Its totient is φ = 135777096.

The previous prime is 135807601. The next prime is 135807629. The reversal of 135807619 is 916708531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916708531 = 29 ⋅31610639.

It is a cyclic number.

It is not a de Polignac number, because 135807619 - 2⁷ = 135807491 is a prime.

It is a super-2 number, since 2×135807619² = 36887418756898322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135807629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7152 + ... + 17965.

It is an arithmetic number, because the mean of its divisors is an integer number (33959536).

Almost surely, 2^135807619 is an apocalyptic number.

135807619 is a deficient number, since it is larger than the sum of its proper divisors (30525).

135807619 is an equidigital number, since it uses as much as digits as its factorization.

135807619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30524.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 135807619 is about 11653.6526033686. The cubic root of 135807619 is about 514.0137205076.

The spelling of 135807619 in words is "one hundred thirty-five million, eight hundred seven thousand, six hundred nineteen".