2139849053 has 4 divisors (see below), whose sum is σ = 2140344540. Its totient is φ = 2139353568.

The previous prime is 2139849043. The next prime is 2139849079. The reversal of 2139849053 is 3509489312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2030583844 + 109265209 = 45062^2 + 10453^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139849053 - 2⁸ = 2139848797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2139848995 and 2139849013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139849043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241208 + ... + 249921.

It is an arithmetic number, because the mean of its divisors is an integer number (535086135).

Almost surely, 2^2139849053 is an apocalyptic number.

It is an amenable number.

2139849053 is a deficient number, since it is larger than the sum of its proper divisors (495487).

2139849053 is an equidigital number, since it uses as much as digits as its factorization.

2139849053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495486.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 2139849053 is about 46258.5024941361. The cubic root of 2139849053 is about 1288.6284428934.

The spelling of 2139849053 in words is "two billion, one hundred thirty-nine million, eight hundred forty-nine thousand, fifty-three".