9139709578697 has 4 divisors (see below), whose sum is σ = 9151533265860. Its totient is φ = 9127885891536.

The previous prime is 9139709578687. The next prime is 9139709578739. The reversal of 9139709578697 is 7968759079319.

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 4513687207936 + 4626022370761 = 2124544^2 + 2150819^2 .

It is a cyclic number.

It is not a de Polignac number, because 9139709578697 - 2¹⁰ = 9139709577673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9139709578687) 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, 5911842422 + ... + 5911843967.

It is an arithmetic number, because the mean of its divisors is an integer number (2287883316465).

Almost surely, 2^{9139709578697} is an apocalyptic number.

It is an amenable number.

9139709578697 is a deficient number, since it is larger than the sum of its proper divisors (11823687163).

9139709578697 is a wasteful number, since it uses less digits than its factorization.

9139709578697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11823687162.

The product of its (nonzero) digits is 1620304560, while the sum is 80.

The spelling of 9139709578697 in words is "nine trillion, one hundred thirty-nine billion, seven hundred nine million, five hundred seventy-eight thousand, six hundred ninety-seven".