135698019 has 8 divisors (see below), whose sum is σ = 190453440. Its totient is φ = 85703976.

The previous prime is 135698009. The next prime is 135698023. The reversal of 135698019 is 910896531.

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

It is not a de Polignac number, because 135698019 - 2²⁴ = 118920803 is a prime.

It is a super-2 number, since 2×135698019² = 36827904721048722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135698009) 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, 1190277 + ... + 1190390.

It is an arithmetic number, because the mean of its divisors is an integer number (23806680).

Almost surely, 2^135698019 is an apocalyptic number.

135698019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135698019 is a deficient number, since it is larger than the sum of its proper divisors (54755421).

135698019 is a wasteful number, since it uses less digits than its factorization.

135698019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380689.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 135698019 is about 11648.9492659209. The cubic root of 135698019 is about 513.8754095013.

The spelling of 135698019 in words is "one hundred thirty-five million, six hundred ninety-eight thousand, nineteen".