1213337985 has 16 divisors (see below), whose sum is σ = 2003965440. Its totient is φ = 626238720.

The previous prime is 1213337981. The next prime is 1213338013. The reversal of 1213337985 is 5897333121.

It is not a de Polignac number, because 1213337985 - 2² = 1213337981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213337981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1304200 + ... + 1305129.

It is an arithmetic number, because the mean of its divisors is an integer number (125247840).

Almost surely, 2^1213337985 is an apocalyptic number.

1213337985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213337985 is a deficient number, since it is larger than the sum of its proper divisors (790627455).

1213337985 is a wasteful number, since it uses less digits than its factorization.

1213337985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609368.

The product of its digits is 136080, while the sum is 42.

The square root of 1213337985 is about 34833.0013780036. The cubic root of 1213337985 is about 1066.5812170590.

The spelling of 1213337985 in words is "one billion, two hundred thirteen million, three hundred thirty-seven thousand, nine hundred eighty-five".