1345210109 has 2 divisors, whose sum is σ = 1345210110. Its totient is φ = 1345210108.

The previous prime is 1345210103. The next prime is 1345210159. The reversal of 1345210109 is 9010125431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 836482084 + 508728025 = 28922^2 + 22555^2 .

It is an emirp because it is prime and its reverse (9010125431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345210109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345210103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672605054 + 672605055.

It is an arithmetic number, because the mean of its divisors is an integer number (672605055).

Almost surely, 2^1345210109 is an apocalyptic number.

It is an amenable number.

1345210109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345210109 is an equidigital number, since it uses as much as digits as its factorization.

1345210109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1345210109 is about 36677.1060608658. The cubic root of 1345210109 is about 1103.9007814132.

The spelling of 1345210109 in words is "one billion, three hundred forty-five million, two hundred ten thousand, one hundred nine".