84196869149 has 4 divisors (see below), whose sum is σ = 84199696764. Its totient is φ = 84194041536.

The previous prime is 84196869131. The next prime is 84196869151. The reversal of 84196869149 is 94196869148.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18516405625 + 65680463524 = 136075^2 + 256282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84196869149 is a prime.

It is a super-2 number, since 2×84196869149² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84196869199) 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, 1368662 + ... + 1428855.

It is an arithmetic number, because the mean of its divisors is an integer number (21049924191).

Almost surely, 2^84196869149 is an apocalyptic number.

It is an amenable number.

84196869149 is a deficient number, since it is larger than the sum of its proper divisors (2827615).

84196869149 is a wasteful number, since it uses less digits than its factorization.

84196869149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827614.

The product of its digits is 26873856, while the sum is 65.

Subtracting 84196869149 from its reverse (94196869148), we obtain a palindrome (9999999999).

The spelling of 84196869149 in words is "eighty-four billion, one hundred ninety-six million, eight hundred sixty-nine thousand, one hundred forty-nine".