1481551493 has 2 divisors, whose sum is σ = 1481551494. Its totient is φ = 1481551492.

The previous prime is 1481551451. The next prime is 1481551517. The reversal of 1481551493 is 3941551841.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1109755969 + 371795524 = 33313^2 + 19282^2 .

It is an emirp because it is prime and its reverse (3941551841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1481551493 - 2²⁶ = 1414442629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1481551493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1481551433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 740775746 + 740775747.

It is an arithmetic number, because the mean of its divisors is an integer number (740775747).

Almost surely, 2^1481551493 is an apocalyptic number.

It is an amenable number.

1481551493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1481551493 is an equidigital number, since it uses as much as digits as its factorization.

1481551493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 1481551493 is about 38490.9274115343. The cubic root of 1481551493 is about 1140.0019218702.

The spelling of 1481551493 in words is "one billion, four hundred eighty-one million, five hundred fifty-one thousand, four hundred ninety-three".