39977231479 has 4 divisors (see below), whose sum is σ = 40389367984. Its totient is φ = 39565094976.

The previous prime is 39977231443. The next prime is 39977231491. The reversal of 39977231479 is 97413277993.

39977231479 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.

It is a cyclic number.

It is not a de Polignac number, because 39977231479 - 2¹⁹ = 39976707191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39977231579) 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, 206068107 + ... + 206068300.

It is an arithmetic number, because the mean of its divisors is an integer number (10097341996).

Almost surely, 2^39977231479 is an apocalyptic number.

39977231479 is a deficient number, since it is larger than the sum of its proper divisors (412136505).

39977231479 is an equidigital number, since it uses as much as digits as its factorization.

39977231479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412136504.

The product of its digits is 18003384, while the sum is 61.

The spelling of 39977231479 in words is "thirty-nine billion, nine hundred seventy-seven million, two hundred thirty-one thousand, four hundred seventy-nine".