1214309989 has 2 divisors, whose sum is σ = 1214309990. Its totient is φ = 1214309988.

The previous prime is 1214309933. The next prime is 1214310043. The reversal of 1214309989 is 9899034121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166768964 + 47541025 = 34158^2 + 6895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214309989 - 2²⁵ = 1180755557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214307989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607154994 + 607154995.

It is an arithmetic number, because the mean of its divisors is an integer number (607154995).

Almost surely, 2^1214309989 is an apocalyptic number.

It is an amenable number.

1214309989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214309989 is an equidigital number, since it uses as much as digits as its factorization.

1214309989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1214309989 is about 34846.9509283094. The cubic root of 1214309989 is about 1066.8659534656.

The spelling of 1214309989 in words is "one billion, two hundred fourteen million, three hundred nine thousand, nine hundred eighty-nine".