1214731609 has 27 divisors (see below), whose sum is σ = 1534118463. Its totient is φ = 958596912.

The previous prime is 1214731603. The next prime is 1214731627. The reversal of 1214731609 is 9061374121.

The square root of 1214731609 is 34853.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 179694025 + 1035037584 = 13405^2 + 32172^2 .

It is not a de Polignac number, because 1214731609 - 2⁵ = 1214731577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1214731603) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3171432 + ... + 3171814.

Almost surely, 2^1214731609 is an apocalyptic number.

1214731609 is the 34853-rd square number.

1214731609 is the 17427-th centered octagonal number.

It is an amenable number.

1214731609 is a deficient number, since it is larger than the sum of its proper divisors (319386854).

1214731609 is an frugal number, since it uses more digits than its factorization.

1214731609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The cubic root of 1214731609 is about 1066.9894145197.

The spelling of 1214731609 in words is "one billion, two hundred fourteen million, seven hundred thirty-one thousand, six hundred nine".