1868135273 has 8 divisors (see below), whose sum is σ = 1908904320. Its totient is φ = 1827408880.

The previous prime is 1868135267. The next prime is 1868135281. The reversal of 1868135273 is 3725318681.

It is a happy number.

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

It is not a de Polignac number, because 1868135273 - 2⁴ = 1868135257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1868135263) 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, 87638 + ... + 106848.

It is an arithmetic number, because the mean of its divisors is an integer number (238613040).

Almost surely, 2^1868135273 is an apocalyptic number.

It is an amenable number.

1868135273 is a deficient number, since it is larger than the sum of its proper divisors (40769047).

1868135273 is a wasteful number, since it uses less digits than its factorization.

1868135273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21327.

The product of its digits is 241920, while the sum is 44.

The square root of 1868135273 is about 43221.9304635968. The cubic root of 1868135273 is about 1231.5993193084.

The spelling of 1868135273 in words is "one billion, eight hundred sixty-eight million, one hundred thirty-five thousand, two hundred seventy-three".