1216983453 has 12 divisors (see below), whose sum is σ = 1887566400. Its totient is φ = 695419032.

The previous prime is 1216983409. The next prime is 1216983473. The reversal of 1216983453 is 3543896121.

It is not a de Polignac number, because 1216983453 - 2⁶ = 1216983389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216983473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4139253 + ... + 4139546.

It is an arithmetic number, because the mean of its divisors is an integer number (157297200).

Almost surely, 2^1216983453 is an apocalyptic number.

It is an amenable number.

1216983453 is a deficient number, since it is larger than the sum of its proper divisors (670582947).

1216983453 is an equidigital number, since it uses as much as digits as its factorization.

1216983453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8278816 (or 8278809 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 1216983453 is about 34885.2899228314. The cubic root of 1216983453 is about 1067.6483283990.

The spelling of 1216983453 in words is "one billion, two hundred sixteen million, nine hundred eighty-three thousand, four hundred fifty-three".