1493404985 has 4 divisors (see below), whose sum is σ = 1792085988. Its totient is φ = 1194723984.

The previous prime is 1493404961. The next prime is 1493404987. The reversal of 1493404985 is 5894043941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5894043941 = 19 ⋅310212839.

It can be written as a sum of positive squares in 2 ways, for example, as 863595769 + 629809216 = 29387^2 + 25096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493404985 - 2¹⁴ = 1493388601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1493404987) 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, 149340494 + ... + 149340503.

It is an arithmetic number, because the mean of its divisors is an integer number (448021497).

Almost surely, 2^1493404985 is an apocalyptic number.

It is an amenable number.

1493404985 is a deficient number, since it is larger than the sum of its proper divisors (298681003).

1493404985 is an equidigital number, since it uses as much as digits as its factorization.

1493404985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298681002.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 1493404985 is about 38644.5983935659. The cubic root of 1493404985 is about 1143.0341317075.

The spelling of 1493404985 in words is "one billion, four hundred ninety-three million, four hundred four thousand, nine hundred eighty-five".