438172113 has 4 divisors (see below), whose sum is σ = 584229488. Its totient is φ = 292114740.

The previous prime is 438172099. The next prime is 438172123. The reversal of 438172113 is 311271834.

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 not a de Polignac number, because 438172113 - 2⁵ = 438172081 is a prime.

It is a super-2 number, since 2×438172113² = 383989601221769538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438172123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73028683 + ... + 73028688.

It is an arithmetic number, because the mean of its divisors is an integer number (146057372).

Almost surely, 2^438172113 is an apocalyptic number.

It is an amenable number.

438172113 is a deficient number, since it is larger than the sum of its proper divisors (146057375).

438172113 is a wasteful number, since it uses less digits than its factorization.

438172113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146057374.

The product of its digits is 4032, while the sum is 30.

The square root of 438172113 is about 20932.5610712115. The cubic root of 438172113 is about 759.5357928132.

The spelling of 438172113 in words is "four hundred thirty-eight million, one hundred seventy-two thousand, one hundred thirteen".