1499389321 has 4 divisors (see below), whose sum is σ = 1500769792. Its totient is φ = 1498008852.

The previous prime is 1499389301. The next prime is 1499389327. The reversal of 1499389321 is 1239839941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1239839941 = 43 ⋅28833487.

It is a cyclic number.

It is not a de Polignac number, because 1499389321 - 2⁷ = 1499389193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1499389327) 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, 688605 + ... + 690778.

It is an arithmetic number, because the mean of its divisors is an integer number (375192448).

Almost surely, 2^1499389321 is an apocalyptic number.

It is an amenable number.

1499389321 is a deficient number, since it is larger than the sum of its proper divisors (1380471).

1499389321 is a wasteful number, since it uses less digits than its factorization.

1499389321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380470.

The product of its digits is 419904, while the sum is 49.

The square root of 1499389321 is about 38721.9488275061. The cubic root of 1499389321 is about 1144.5588763675.

The spelling of 1499389321 in words is "one billion, four hundred ninety-nine million, three hundred eighty-nine thousand, three hundred twenty-one".