438512197979 has 8 divisors (see below), whose sum is σ = 440291411568. Its totient is φ = 436734396000.

The previous prime is 438512197967. The next prime is 438512198027. The reversal of 438512197979 is 979791215834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 438512197979 - 2⁸ = 438512197723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438512197909) 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 7 ways as a sum of consecutive naturals, for example, 271889 + ... + 975165.

It is an arithmetic number, because the mean of its divisors is an integer number (55036426446).

Almost surely, 2^438512197979 is an apocalyptic number.

438512197979 is a deficient number, since it is larger than the sum of its proper divisors (1779213589).

438512197979 is a wasteful number, since it uses less digits than its factorization.

438512197979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705805.

The product of its digits is 34292160, while the sum is 65.

The spelling of 438512197979 in words is "four hundred thirty-eight billion, five hundred twelve million, one hundred ninety-seven thousand, nine hundred seventy-nine".