2139694553 has 4 divisors (see below), whose sum is σ = 2169831168. Its totient is φ = 2109557940.

The previous prime is 2139694547. The next prime is 2139694561. The reversal of 2139694553 is 3554969312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2139694553 - 2¹² = 2139690457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2139694498 and 2139694507.

It is not an unprimeable number, because it can be changed into a prime (2139699553) 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, 15068201 + ... + 15068342.

It is an arithmetic number, because the mean of its divisors is an integer number (542457792).

Almost surely, 2^2139694553 is an apocalyptic number.

It is an amenable number.

2139694553 is a deficient number, since it is larger than the sum of its proper divisors (30136615).

2139694553 is an equidigital number, since it uses as much as digits as its factorization.

2139694553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30136614.

The product of its digits is 874800, while the sum is 47.

The square root of 2139694553 is about 46256.8325007236. The cubic root of 2139694553 is about 1288.5974285739.

The spelling of 2139694553 in words is "two billion, one hundred thirty-nine million, six hundred ninety-four thousand, five hundred fifty-three".