84140004149 has 4 divisors (see below), whose sum is σ = 88568425440. Its totient is φ = 79711582860.

The previous prime is 84140004139. The next prime is 84140004163. The reversal of 84140004149 is 94140004148.

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 84140004149 - 2⁴ = 84140004133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84140004139) 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, 2214210617 + ... + 2214210654.

It is an arithmetic number, because the mean of its divisors is an integer number (22142106360).

Almost surely, 2^84140004149 is an apocalyptic number.

It is an amenable number.

84140004149 is a deficient number, since it is larger than the sum of its proper divisors (4428421291).

84140004149 is a wasteful number, since it uses less digits than its factorization.

84140004149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428421290.

The product of its (nonzero) digits is 18432, while the sum is 35.

Subtracting 84140004149 from its reverse (94140004148), we obtain a palindrome (9999999999).

The spelling of 84140004149 in words is "eighty-four billion, one hundred forty million, four thousand, one hundred forty-nine".