438169939 has 4 divisors (see below), whose sum is σ = 441620224. Its totient is φ = 434719656.

The previous prime is 438169937. The next prime is 438169969. The reversal of 438169939 is 939961834.

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 438169939 - 2¹ = 438169937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438169937) 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, 1724952 + ... + 1725205.

It is an arithmetic number, because the mean of its divisors is an integer number (110405056).

Almost surely, 2^438169939 is an apocalyptic number.

438169939 is a deficient number, since it is larger than the sum of its proper divisors (3450285).

438169939 is a wasteful number, since it uses less digits than its factorization.

438169939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450284.

The product of its digits is 1259712, while the sum is 52.

The square root of 438169939 is about 20932.5091424798. The cubic root of 438169939 is about 759.5345366603.

The spelling of 438169939 in words is "four hundred thirty-eight million, one hundred sixty-nine thousand, nine hundred thirty-nine".