1438016659 has 4 divisors (see below), whose sum is σ = 1439536104. Its totient is φ = 1436497216.

The previous prime is 1438016651. The next prime is 1438016663. The reversal of 1438016659 is 9566108341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9566108341 = 79 ⋅121089979.

It is a cyclic number.

It is not a de Polignac number, because 1438016659 - 2³ = 1438016651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438016651) 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, 758302 + ... + 760195.

It is an arithmetic number, because the mean of its divisors is an integer number (359884026).

Almost surely, 2^1438016659 is an apocalyptic number.

1438016659 is a deficient number, since it is larger than the sum of its proper divisors (1519445).

1438016659 is an equidigital number, since it uses as much as digits as its factorization.

1438016659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519444.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1438016659 is about 37921.1901052696. The cubic root of 1438016659 is about 1128.7245533046.

The spelling of 1438016659 in words is "one billion, four hundred thirty-eight million, sixteen thousand, six hundred fifty-nine".