39520069091 has 4 divisors (see below), whose sum is σ = 39605796384. Its totient is φ = 39434341800.

The previous prime is 39520069067. The next prime is 39520069117. The reversal of 39520069091 is 19096002593.

39520069091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19096002593 = 71 ⋅268957783.

It is a cyclic number.

It is not a de Polignac number, because 39520069091 - 2¹⁴ = 39520052707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39520069291) 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, 42862955 + ... + 42863876.

It is an arithmetic number, because the mean of its divisors is an integer number (9901449096).

Almost surely, 2^39520069091 is an apocalyptic number.

39520069091 is a deficient number, since it is larger than the sum of its proper divisors (85727293).

39520069091 is an equidigital number, since it uses as much as digits as its factorization.

39520069091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85727292.

The product of its (nonzero) digits is 131220, while the sum is 44.

The spelling of 39520069091 in words is "thirty-nine billion, five hundred twenty million, sixty-nine thousand, ninety-one".