39719973889 has 4 divisors (see below), whose sum is σ = 40643694256. Its totient is φ = 38796253524.

The previous prime is 39719973883. The next prime is 39719973959. The reversal of 39719973889 is 98837991793.

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 39719973889 - 2²⁹ = 39183102977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39719973883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461860119 + ... + 461860204.

It is an arithmetic number, because the mean of its divisors is an integer number (10160923564).

Almost surely, 2^39719973889 is an apocalyptic number.

It is an amenable number.

39719973889 is a deficient number, since it is larger than the sum of its proper divisors (923720367).

39719973889 is an equidigital number, since it uses as much as digits as its factorization.

39719973889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923720366.

The product of its digits is 185177664, while the sum is 73.

The spelling of 39719973889 in words is "thirty-nine billion, seven hundred nineteen million, nine hundred seventy-three thousand, eight hundred eighty-nine".