1309211453 has 4 divisors (see below), whose sum is σ = 1428230688. Its totient is φ = 1190192220.

The previous prime is 1309211443. The next prime is 1309211471. The reversal of 1309211453 is 3541129031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1309211453 - 2¹⁸ = 1308949309 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 (1309211443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59509601 + ... + 59509622.

It is an arithmetic number, because the mean of its divisors is an integer number (357057672).

Almost surely, 2^1309211453 is an apocalyptic number.

It is an amenable number.

1309211453 is a deficient number, since it is larger than the sum of its proper divisors (119019235).

1309211453 is a wasteful number, since it uses less digits than its factorization.

1309211453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119019234.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1309211453 is about 36183.0271398069. The cubic root of 1309211453 is about 1093.9645913295.

The spelling of 1309211453 in words is "one billion, three hundred nine million, two hundred eleven thousand, four hundred fifty-three".