1214599989 has 4 divisors (see below), whose sum is σ = 1619466656. Its totient is φ = 809733324.

The previous prime is 1214599963. The next prime is 1214600017. The reversal of 1214599989 is 9899954121.

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 not a de Polignac number, because 1214599989 - 2⁷ = 1214599861 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 (1214599889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202433329 + ... + 202433334.

It is an arithmetic number, because the mean of its divisors is an integer number (404866664).

Almost surely, 2^1214599989 is an apocalyptic number.

It is an amenable number.

1214599989 is a deficient number, since it is larger than the sum of its proper divisors (404866667).

1214599989 is an equidigital number, since it uses as much as digits as its factorization.

1214599989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404866666.

The product of its digits is 2099520, while the sum is 57.

The square root of 1214599989 is about 34851.1117326263. Note that the first 3 decimals coincide. The cubic root of 1214599989 is about 1066.9508759053.

The spelling of 1214599989 in words is "one billion, two hundred fourteen million, five hundred ninety-nine thousand, nine hundred eighty-nine".