39798061721197 has 4 divisors (see below), whose sum is σ = 42859451084380. Its totient is φ = 36736672358016.

The previous prime is 39798061721149. The next prime is 39798061721203. The reversal of 39798061721197 is 79112716089793.

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 6468812344996 + 33329249376201 = 2543386^2 + 5773149^2 .

It is a cyclic number.

It is not a de Polignac number, because 39798061721197 - 2²⁷ = 39797927503469 is a prime.

It is a super-2 number, since 2×39798061721197² (a number of 28 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 (39798061722197) 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, 1530694681572 + ... + 1530694681597.

It is an arithmetic number, because the mean of its divisors is an integer number (10714862771095).

Almost surely, 2^{39798061721197} is an apocalyptic number.

It is an amenable number.

39798061721197 is a deficient number, since it is larger than the sum of its proper divisors (3061389363183).

39798061721197 is a wasteful number, since it uses less digits than its factorization.

39798061721197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061389363182.

The product of its (nonzero) digits is 72013536, while the sum is 70.

The spelling of 39798061721197 in words is "thirty-nine trillion, seven hundred ninety-eight billion, sixty-one million, seven hundred twenty-one thousand, one hundred ninety-seven".