135919863 has 32 divisors (see below), whose sum is σ = 214643200. Its totient is φ = 85817880.

The previous prime is 135919859. The next prime is 135919867. The reversal of 135919863 is 368919531.

It is an interprime number because it is at equal distance from previous prime (135919859) and next prime (135919867).

It is not a de Polignac number, because 135919863 - 2² = 135919859 is a prime.

It is a super-3 number, since 3×135919863³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135919867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39918 + ... + 43188.

It is an arithmetic number, because the mean of its divisors is an integer number (6707600).

Almost surely, 2^135919863 is an apocalyptic number.

135919863 is a deficient number, since it is larger than the sum of its proper divisors (78723337).

135919863 is an frugal number, since it uses more digits than its factorization.

135919863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311 (or 3293 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 135919863 is about 11658.4674378754. The cubic root of 135919863 is about 514.1552910345.

The spelling of 135919863 in words is "one hundred thirty-five million, nine hundred nineteen thousand, eight hundred sixty-three".