1215963983 has 8 divisors (see below), whose sum is σ = 1309963200. Its totient is φ = 1122031008.

The previous prime is 1215963941. The next prime is 1215963989. The reversal of 1215963983 is 3893695121.

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 1215963983 - 2¹⁴ = 1215947599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215963989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25553 + ... + 55541.

It is an arithmetic number, because the mean of its divisors is an integer number (163745400).

Almost surely, 2^1215963983 is an apocalyptic number.

1215963983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1215963983 is a deficient number, since it is larger than the sum of its proper divisors (93999217).

1215963983 is a wasteful number, since it uses less digits than its factorization.

1215963983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33121.

The product of its digits is 349920, while the sum is 47.

The square root of 1215963983 is about 34870.6751153458. The cubic root of 1215963983 is about 1067.3501212463.

The spelling of 1215963983 in words is "one billion, two hundred fifteen million, nine hundred sixty-three thousand, nine hundred eighty-three".