2187742039 has 4 divisors (see below), whose sum is σ = 2500276624. Its totient is φ = 1875207456.

The previous prime is 2187742027. The next prime is 2187742069. The reversal of 2187742039 is 9302477812.

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 2187742039 - 2¹⁷ = 2187610967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2187741986 and 2187742004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187742069) 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, 156267282 + ... + 156267295.

It is an arithmetic number, because the mean of its divisors is an integer number (625069156).

Almost surely, 2^2187742039 is an apocalyptic number.

2187742039 is a deficient number, since it is larger than the sum of its proper divisors (312534585).

2187742039 is an equidigital number, since it uses as much as digits as its factorization.

2187742039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312534584.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2187742039 is about 46773.3047688529. The cubic root of 2187742039 is about 1298.1714012620.

The spelling of 2187742039 in words is "two billion, one hundred eighty-seven million, seven hundred forty-two thousand, thirty-nine".