1438969321 has 16 divisors (see below), whose sum is σ = 1483762176. Its totient is φ = 1395000000.

The previous prime is 1438969303. The next prime is 1438969339. The reversal of 1438969321 is 1239698341.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1438969303) and next prime (1438969339).

It is a cyclic number.

It is not a de Polignac number, because 1438969321 - 2¹³ = 1438961129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438969381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1915696 + ... + 1916446.

It is an arithmetic number, because the mean of its divisors is an integer number (92735136).

Almost surely, 2^1438969321 is an apocalyptic number.

It is an amenable number.

1438969321 is a deficient number, since it is larger than the sum of its proper divisors (44792855).

1438969321 is a wasteful number, since it uses less digits than its factorization.

1438969321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its digits is 279936, while the sum is 46.

The square root of 1438969321 is about 37933.7491028767. The cubic root of 1438969321 is about 1128.9737519993.

The spelling of 1438969321 in words is "one billion, four hundred thirty-eight million, nine hundred sixty-nine thousand, three hundred twenty-one".