438137129 has 4 divisors (see below), whose sum is σ = 438183876. Its totient is φ = 438090384.

The previous prime is 438137123. The next prime is 438137137. The reversal of 438137129 is 921731834.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 90687529 + 347449600 = 9523^2 + 18640^2 .

It is a cyclic number.

It is not a de Polignac number, because 438137129 - 2⁴ = 438137113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438137092 and 438137101.

It is not an unprimeable number, because it can be changed into a prime (438137123) 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, 3914 + ... + 29859.

It is an arithmetic number, because the mean of its divisors is an integer number (109545969).

Almost surely, 2^438137129 is an apocalyptic number.

It is an amenable number.

438137129 is a deficient number, since it is larger than the sum of its proper divisors (46747).

438137129 is a wasteful number, since it uses less digits than its factorization.

438137129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46746.

The product of its digits is 36288, while the sum is 38.

The square root of 438137129 is about 20931.7254186080. The cubic root of 438137129 is about 759.5155783004.

The spelling of 438137129 in words is "four hundred thirty-eight million, one hundred thirty-seven thousand, one hundred twenty-nine".