1457789393 has 2 divisors, whose sum is σ = 1457789394. Its totient is φ = 1457789392.

The previous prime is 1457789387. The next prime is 1457789401. The reversal of 1457789393 is 3939877541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1418501569 + 39287824 = 37663^2 + 6268^2 .

It is an emirp because it is prime and its reverse (3939877541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1457789393 - 2²² = 1453595089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1457789363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728894696 + 728894697.

It is an arithmetic number, because the mean of its divisors is an integer number (728894697).

Almost surely, 2^1457789393 is an apocalyptic number.

It is an amenable number.

1457789393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457789393 is an equidigital number, since it uses as much as digits as its factorization.

1457789393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 56.

The square root of 1457789393 is about 38181.0082763669. The cubic root of 1457789393 is about 1133.8743438827.

The spelling of 1457789393 in words is "one billion, four hundred fifty-seven million, seven hundred eighty-nine thousand, three hundred ninety-three".