1457318393 has 2 divisors, whose sum is σ = 1457318394. Its totient is φ = 1457318392.

The previous prime is 1457318389. The next prime is 1457318417. The reversal of 1457318393 is 3938137541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 911254969 + 546063424 = 30187^2 + 23368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1457318393 - 2² = 1457318389 is a prime.

It is a super-3 number, since 3×1457318393³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1457318323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728659196 + 728659197.

It is an arithmetic number, because the mean of its divisors is an integer number (728659197).

Almost surely, 2^1457318393 is an apocalyptic number.

It is an amenable number.

1457318393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457318393 is an equidigital number, since it uses as much as digits as its factorization.

1457318393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 1457318393 is about 38174.8397901026. The cubic root of 1457318393 is about 1133.7522155092.

The spelling of 1457318393 in words is "one billion, four hundred fifty-seven million, three hundred eighteen thousand, three hundred ninety-three".