1394073281 has 2 divisors, whose sum is σ = 1394073282. Its totient is φ = 1394073280.

The previous prime is 1394073269. The next prime is 1394073313. The reversal of 1394073281 is 1823704931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 955799056 + 438274225 = 30916^2 + 20935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394073281 - 2²⁶ = 1326964417 is a prime.

It is a super-2 number, since 2×1394073281² = 3886880625596209922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1394073581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697036640 + 697036641.

It is an arithmetic number, because the mean of its divisors is an integer number (697036641).

Almost surely, 2^1394073281 is an apocalyptic number.

It is an amenable number.

1394073281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394073281 is an equidigital number, since it uses as much as digits as its factorization.

1394073281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1394073281 is about 37337.2907560257. The cubic root of 1394073281 is about 1117.1081008808.

The spelling of 1394073281 in words is "one billion, three hundred ninety-four million, seventy-three thousand, two hundred eighty-one".