1493981279 has 4 divisors (see below), whose sum is σ = 1707407184. Its totient is φ = 1280555376.

The previous prime is 1493981273. The next prime is 1493981309. The reversal of 1493981279 is 9721893941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9721893941 = 9221 ⋅1054321.

It is a cyclic number.

It is not a de Polignac number, because 1493981279 - 2¹² = 1493977183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1493981279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493981273) 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, 106712942 + ... + 106712955.

It is an arithmetic number, because the mean of its divisors is an integer number (426851796).

Almost surely, 2^1493981279 is an apocalyptic number.

1493981279 is a deficient number, since it is larger than the sum of its proper divisors (213425905).

1493981279 is an equidigital number, since it uses as much as digits as its factorization.

1493981279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213425904.

The product of its digits is 979776, while the sum is 53.

The square root of 1493981279 is about 38652.0540075169. The cubic root of 1493981279 is about 1143.1811422872.

The spelling of 1493981279 in words is "one billion, four hundred ninety-three million, nine hundred eighty-one thousand, two hundred seventy-nine".