1662728453 has 2 divisors, whose sum is σ = 1662728454. Its totient is φ = 1662728452.

The previous prime is 1662728393. The next prime is 1662728531. The reversal of 1662728453 is 3548272661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1583482849 + 79245604 = 39793^2 + 8902^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662728453 - 2¹⁴ = 1662712069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662128453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831364226 + 831364227.

It is an arithmetic number, because the mean of its divisors is an integer number (831364227).

Almost surely, 2^1662728453 is an apocalyptic number.

It is an amenable number.

1662728453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662728453 is an equidigital number, since it uses as much as digits as its factorization.

1662728453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 1662728453 is about 40776.5674499461. The cubic root of 1662728453 is about 1184.6965112650.

The spelling of 1662728453 in words is "one billion, six hundred sixty-two million, seven hundred twenty-eight thousand, four hundred fifty-three".