1214321309 has 2 divisors, whose sum is σ = 1214321310. Its totient is φ = 1214321308.

The previous prime is 1214321299. The next prime is 1214321341. The reversal of 1214321309 is 9031234121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1140412900 + 73908409 = 33770^2 + 8597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214321309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214321209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607160654 + 607160655.

It is an arithmetic number, because the mean of its divisors is an integer number (607160655).

Almost surely, 2^1214321309 is an apocalyptic number.

It is an amenable number.

1214321309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214321309 is an equidigital number, since it uses as much as digits as its factorization.

1214321309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1214321309 is about 34847.1133524715. The cubic root of 1214321309 is about 1066.8692686227.

The spelling of 1214321309 in words is "one billion, two hundred fourteen million, three hundred twenty-one thousand, three hundred nine".