1493334681 has 4 divisors (see below), whose sum is σ = 1991112912. Its totient is φ = 995556452.

The previous prime is 1493334643. The next prime is 1493334721. The reversal of 1493334681 is 1864333941.

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.

It is a cyclic number.

It is not a de Polignac number, because 1493334681 - 2¹⁴ = 1493318297 is a prime.

It is a super-2 number, since 2×1493334681² = 4460096938954743522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1493314681) 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, 248889111 + ... + 248889116.

It is an arithmetic number, because the mean of its divisors is an integer number (497778228).

Almost surely, 2^1493334681 is an apocalyptic number.

It is an amenable number.

1493334681 is a deficient number, since it is larger than the sum of its proper divisors (497778231).

1493334681 is an equidigital number, since it uses as much as digits as its factorization.

1493334681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497778230.

The product of its digits is 186624, while the sum is 42.

The square root of 1493334681 is about 38643.6887602620. The cubic root of 1493334681 is about 1143.0161948153.

The spelling of 1493334681 in words is "one billion, four hundred ninety-three million, three hundred thirty-four thousand, six hundred eighty-one".