84397139709 has 16 divisors (see below), whose sum is σ = 113079518400. Its totient is φ = 55989999360.

The previous prime is 84397139683. The next prime is 84397139719. The reversal of 84397139709 is 90793179348.

It is a happy number.

It is not a de Polignac number, because 84397139709 - 2¹³ = 84397131517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84397139719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1442967 + ... + 1500315.

It is an arithmetic number, because the mean of its divisors is an integer number (7067469900).

Almost surely, 2^84397139709 is an apocalyptic number.

It is an amenable number.

84397139709 is a deficient number, since it is larger than the sum of its proper divisors (28682378691).

84397139709 is a wasteful number, since it uses less digits than its factorization.

84397139709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59740.

The product of its (nonzero) digits is 10287648, while the sum is 60.

The spelling of 84397139709 in words is "eighty-four billion, three hundred ninety-seven million, one hundred thirty-nine thousand, seven hundred nine".