2139355387 has 4 divisors (see below), whose sum is σ = 2303921200. Its totient is φ = 1974789576.

The previous prime is 2139355363. The next prime is 2139355397. The reversal of 2139355387 is 7835539312.

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

It is a cyclic number.

It is not a de Polignac number, because 2139355387 - 2¹¹ = 2139353339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139355357) 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, 82282887 + ... + 82282912.

It is an arithmetic number, because the mean of its divisors is an integer number (575980300).

Almost surely, 2^2139355387 is an apocalyptic number.

2139355387 is a deficient number, since it is larger than the sum of its proper divisors (164565813).

2139355387 is a wasteful number, since it uses less digits than its factorization.

2139355387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164565812.

The product of its digits is 680400, while the sum is 46.

The square root of 2139355387 is about 46253.1662375669. The cubic root of 2139355387 is about 1288.5293391778.

The spelling of 2139355387 in words is "two billion, one hundred thirty-nine million, three hundred fifty-five thousand, three hundred eighty-seven".