1493839643 has 4 divisors (see below), whose sum is σ = 1504743720. Its totient is φ = 1482935568.

The previous prime is 1493839639. The next prime is 1493839649. The reversal of 1493839643 is 3469383941.

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 1493839643 - 2² = 1493839639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1493839591 and 1493839600.

It is not an unprimeable number, because it can be changed into a prime (1493839649) 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, 5451833 + ... + 5452106.

It is an arithmetic number, because the mean of its divisors is an integer number (376185930).

Almost surely, 2^1493839643 is an apocalyptic number.

1493839643 is a deficient number, since it is larger than the sum of its proper divisors (10904077).

1493839643 is a wasteful number, since it uses less digits than its factorization.

1493839643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904076.

The product of its digits is 1679616, while the sum is 50.

The square root of 1493839643 is about 38650.2217716794. The cubic root of 1493839643 is about 1143.1450149444.

The spelling of 1493839643 in words is "one billion, four hundred ninety-three million, eight hundred thirty-nine thousand, six hundred forty-three".