1493604823 has 4 divisors (see below), whose sum is σ = 1495144008. Its totient is φ = 1492065640.

The previous prime is 1493604821. The next prime is 1493604829. The reversal of 1493604823 is 3284063941.

It is a happy number.

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 1493604823 - 2¹ = 1493604821 is a prime.

It is a super-2 number, since 2×1493604823² = 4461710734577722658, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493604821) 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, 768136 + ... + 770077.

It is an arithmetic number, because the mean of its divisors is an integer number (373786002).

Almost surely, 2^1493604823 is an apocalyptic number.

1493604823 is a deficient number, since it is larger than the sum of its proper divisors (1539185).

1493604823 is an equidigital number, since it uses as much as digits as its factorization.

1493604823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539184.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1493604823 is about 38647.1838948196. The cubic root of 1493604823 is about 1143.0851139637.

The spelling of 1493604823 in words is "one billion, four hundred ninety-three million, six hundred four thousand, eight hundred twenty-three".