1213666453 has 8 divisors (see below), whose sum is σ = 1217311128. Its totient is φ = 1210028544.

The previous prime is 1213666427. The next prime is 1213666457. The reversal of 1213666453 is 3546663121.

It can be written as a sum of positive squares in 4 ways, for example, as 620159409 + 593507044 = 24903^2 + 24362^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213666453 - 2²¹ = 1211569301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213666457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846225 + ... + 847657.

It is an arithmetic number, because the mean of its divisors is an integer number (152163891).

Almost surely, 2^1213666453 is an apocalyptic number.

It is an amenable number.

1213666453 is a deficient number, since it is larger than the sum of its proper divisors (3644675).

1213666453 is a wasteful number, since it uses less digits than its factorization.

1213666453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383.

The product of its digits is 77760, while the sum is 37.

The square root of 1213666453 is about 34837.7159555560. The cubic root of 1213666453 is about 1066.6774546543.

The spelling of 1213666453 in words is "one billion, two hundred thirteen million, six hundred sixty-six thousand, four hundred fifty-three".