1318730453 has 4 divisors (see below), whose sum is σ = 1330400748. Its totient is φ = 1307060160.

The previous prime is 1318730447. The next prime is 1318730459. The reversal of 1318730453 is 3540378131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3540378131 = 59 ⋅60006409.

It is an interprime number because it is at equal distance from previous prime (1318730447) and next prime (1318730459).

It can be written as a sum of positive squares in 2 ways, for example, as 140730769 + 1177999684 = 11863^2 + 34322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318730453 - 2¹⁴ = 1318714069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318730459) 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 in 3 ways as a sum of consecutive naturals, for example, 5834978 + ... + 5835203.

It is an arithmetic number, because the mean of its divisors is an integer number (332600187).

Almost surely, 2^1318730453 is an apocalyptic number.

It is an amenable number.

1318730453 is a deficient number, since it is larger than the sum of its proper divisors (11670295).

1318730453 is a wasteful number, since it uses less digits than its factorization.

1318730453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11670294.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1318730453 is about 36314.3284806425. The cubic root of 1318730453 is about 1096.6095199181.

The spelling of 1318730453 in words is "one billion, three hundred eighteen million, seven hundred thirty thousand, four hundred fifty-three".