1209620453 has 2 divisors, whose sum is σ = 1209620454. Its totient is φ = 1209620452.

The previous prime is 1209620443. The next prime is 1209620459. The reversal of 1209620453 is 3540269021.

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., 1176695809 + 32924644 = 34303^2 + 5738^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209620453 - 2⁴ = 1209620437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209620459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604810226 + 604810227.

It is an arithmetic number, because the mean of its divisors is an integer number (604810227).

Almost surely, 2^1209620453 is an apocalyptic number.

It is an amenable number.

1209620453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209620453 is an equidigital number, since it uses as much as digits as its factorization.

1209620453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1209620453 is about 34779.5982294218. The cubic root of 1209620453 is about 1065.4908074477.

Adding to 1209620453 its reverse (3540269021), we get a palindrome (4749889474).

The spelling of 1209620453 in words is "one billion, two hundred nine million, six hundred twenty thousand, four hundred fifty-three".