39720654969 has 4 divisors (see below), whose sum is σ = 52960873296. Its totient is φ = 26480436644.

The previous prime is 39720654947. The next prime is 39720654997. The reversal of 39720654969 is 96945602793.

39720654969 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39720654969 - 2¹² = 39720650873 is a prime.

It is a super-2 number, since 2×39720654969² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39720654469) 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, 6620109159 + ... + 6620109164.

It is an arithmetic number, because the mean of its divisors is an integer number (13240218324).

Almost surely, 2^39720654969 is an apocalyptic number.

It is an amenable number.

39720654969 is a deficient number, since it is larger than the sum of its proper divisors (13240218327).

39720654969 is a wasteful number, since it uses less digits than its factorization.

39720654969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13240218326.

The product of its (nonzero) digits is 22044960, while the sum is 60.

The spelling of 39720654969 in words is "thirty-nine billion, seven hundred twenty million, six hundred fifty-four thousand, nine hundred sixty-nine".