84109391949 has 8 divisors (see below), whose sum is σ = 122340933792. Its totient is φ = 50975389040.

The previous prime is 84109391941. The next prime is 84109391963. The reversal of 84109391949 is 94919390148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84109391949 - 2³ = 84109391941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84109391941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274384694 + ... + 1274384759.

It is an arithmetic number, because the mean of its divisors is an integer number (15292616724).

Almost surely, 2^84109391949 is an apocalyptic number.

It is an amenable number.

84109391949 is a deficient number, since it is larger than the sum of its proper divisors (38231541843).

84109391949 is a wasteful number, since it uses less digits than its factorization.

84109391949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548769467.

The product of its (nonzero) digits is 2519424, while the sum is 57.

The spelling of 84109391949 in words is "eighty-four billion, one hundred nine million, three hundred ninety-one thousand, nine hundred forty-nine".