7890843149 has 16 divisors (see below), whose sum is σ = 9412381440. Its totient is φ = 6474099840.

The previous prime is 7890843139. The next prime is 7890843157. The reversal of 7890843149 is 9413480987.

It is a cyclic number.

It is not a de Polignac number, because 7890843149 - 2⁴ = 7890843133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 7890843149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890843109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244169 + ... + 274590.

It is an arithmetic number, because the mean of its divisors is an integer number (588273840).

Almost surely, 2^7890843149 is an apocalyptic number.

It is an amenable number.

7890843149 is a deficient number, since it is larger than the sum of its proper divisors (1521538291).

7890843149 is a wasteful number, since it uses less digits than its factorization.

7890843149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518860.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 7890843149 is about 88830.4179265188. The cubic root of 7890843149 is about 1990.8619069674.

The spelling of 7890843149 in words is "seven billion, eight hundred ninety million, eight hundred forty-three thousand, one hundred forty-nine".