394658468453 has 2 divisors, whose sum is σ = 394658468454. Its totient is φ = 394658468452.

The previous prime is 394658468437. The next prime is 394658468461. The reversal of 394658468453 is 354864856493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355064632129 + 39593836324 = 595873^2 + 198982^2 .

It is a cyclic number.

It is not a de Polignac number, because 394658468453 - 2⁴ = 394658468437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394658468453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394658468473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197329234226 + 197329234227.

It is an arithmetic number, because the mean of its divisors is an integer number (197329234227).

Almost surely, 2^394658468453 is an apocalyptic number.

It is an amenable number.

394658468453 is a deficient number, since it is larger than the sum of its proper divisors (1).

394658468453 is an equidigital number, since it uses as much as digits as its factorization.

394658468453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 298598400, while the sum is 65.

The spelling of 394658468453 in words is "three hundred ninety-four billion, six hundred fifty-eight million, four hundred sixty-eight thousand, four hundred fifty-three".