1868749253 has 8 divisors (see below), whose sum is σ = 2136019200. Its totient is φ = 1601555760.

The previous prime is 1868749249. The next prime is 1868749261. The reversal of 1868749253 is 3529478681.

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

It is not a de Polignac number, because 1868749253 - 2² = 1868749249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1868749195 and 1868749204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868749283) 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, 49883 + ... + 78903.

It is an arithmetic number, because the mean of its divisors is an integer number (267002400).

Almost surely, 2^1868749253 is an apocalyptic number.

It is an amenable number.

1868749253 is a deficient number, since it is larger than the sum of its proper divisors (267269947).

1868749253 is an equidigital number, since it uses as much as digits as its factorization.

1868749253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38227.

The product of its digits is 2903040, while the sum is 53.

The square root of 1868749253 is about 43229.0325244505. The cubic root of 1868749253 is about 1231.7342300462.

The spelling of 1868749253 in words is "one billion, eight hundred sixty-eight million, seven hundred forty-nine thousand, two hundred fifty-three".