135647919 has 16 divisors (see below), whose sum is σ = 219229440. Its totient is φ = 82210680.

The previous prime is 135647917. The next prime is 135647933. The reversal of 135647919 is 919746531.

135647919 is a `hidden beast` number, since 1 + 3 + 564 + 79 + 19 = 666.

135647919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135647919 - 2¹ = 135647917 is a prime.

It is a super-2 number, since 2×135647919² = 36800715858061122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135647917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228067 + ... + 228660.

It is an arithmetic number, because the mean of its divisors is an integer number (13701840).

Almost surely, 2^135647919 is an apocalyptic number.

135647919 is a deficient number, since it is larger than the sum of its proper divisors (83581521).

135647919 is a wasteful number, since it uses less digits than its factorization.

135647919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456747 (or 456741 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 135647919 is about 11646.7986588590. The cubic root of 135647919 is about 513.8121604152.

The spelling of 135647919 in words is "one hundred thirty-five million, six hundred forty-seven thousand, nine hundred nineteen".