1209968453 has 2 divisors, whose sum is σ = 1209968454. Its totient is φ = 1209968452.

The previous prime is 1209968449. The next prime is 1209968509. The reversal of 1209968453 is 3548699021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129094404 + 80874049 = 33602^2 + 8993^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209968453 - 2² = 1209968449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1209968398 and 1209968407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209938453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604984226 + 604984227.

It is an arithmetic number, because the mean of its divisors is an integer number (604984227).

Almost surely, 2^1209968453 is an apocalyptic number.

It is an amenable number.

1209968453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209968453 is an equidigital number, since it uses as much as digits as its factorization.

1209968453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 1209968453 is about 34784.6008026540. The cubic root of 1209968453 is about 1065.5929759275.

The spelling of 1209968453 in words is "one billion, two hundred nine million, nine hundred sixty-eight thousand, four hundred fifty-three".