1272722393 has 2 divisors, whose sum is σ = 1272722394. Its totient is φ = 1272722392.

The previous prime is 1272722383. The next prime is 1272722413. The reversal of 1272722393 is 3932272721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200761104 + 71961289 = 34652^2 + 8483^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272722393 - 2²⁴ = 1255945177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272722383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636361196 + 636361197.

It is an arithmetic number, because the mean of its divisors is an integer number (636361197).

Almost surely, 2^1272722393 is an apocalyptic number.

It is an amenable number.

1272722393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272722393 is an equidigital number, since it uses as much as digits as its factorization.

1272722393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 1272722393 is about 35675.2350097375. The cubic root of 1272722393 is about 1083.7053776570.

The spelling of 1272722393 in words is "one billion, two hundred seventy-two million, seven hundred twenty-two thousand, three hundred ninety-three".