2139530087 has 4 divisors (see below), whose sum is σ = 2265384816. Its totient is φ = 2013675360.

The previous prime is 2139530051. The next prime is 2139530119. The reversal of 2139530087 is 7800359312.

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 2139530087 - 2⁸ = 2139529831 is a prime.

It is a super-4 number, since 4×2139530087⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2139530087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139530027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62927339 + ... + 62927372.

It is an arithmetic number, because the mean of its divisors is an integer number (566346204).

Almost surely, 2^2139530087 is an apocalyptic number.

2139530087 is a deficient number, since it is larger than the sum of its proper divisors (125854729).

2139530087 is a wasteful number, since it uses less digits than its factorization.

2139530087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125854728.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 2139530087 is about 46255.0547183765. The cubic root of 2139530087 is about 1288.5644120398.

Adding to 2139530087 its reverse (7800359312), we get a palindrome (9939889399).

The spelling of 2139530087 in words is "two billion, one hundred thirty-nine million, five hundred thirty thousand, eighty-seven".