1340371453 has 2 divisors, whose sum is σ = 1340371454. Its totient is φ = 1340371452.

The previous prime is 1340371451. The next prime is 1340371457. The reversal of 1340371453 is 3541730431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234960164 + 105411289 = 35142^2 + 10267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340371453 - 2¹ = 1340371451 is a prime.

Together with 1340371451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340371451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670185726 + 670185727.

It is an arithmetic number, because the mean of its divisors is an integer number (670185727).

Almost surely, 2^1340371453 is an apocalyptic number.

It is an amenable number.

1340371453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340371453 is an equidigital number, since it uses as much as digits as its factorization.

1340371453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 1340371453 is about 36611.0837452267. The cubic root of 1340371453 is about 1102.5756319860.

The spelling of 1340371453 in words is "one billion, three hundred forty million, three hundred seventy-one thousand, four hundred fifty-three".