1230109309 has 16 divisors (see below), whose sum is σ = 1449040320. Its totient is φ = 1029490560.

The previous prime is 1230109291. The next prime is 1230109313. The reversal of 1230109309 is 9039010321.

It is a cyclic number.

It is not a de Polignac number, because 1230109309 - 2¹¹ = 1230107261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230109369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42849 + ... + 65545.

It is an arithmetic number, because the mean of its divisors is an integer number (90565020).

Almost surely, 2^1230109309 is an apocalyptic number.

It is an amenable number.

1230109309 is a deficient number, since it is larger than the sum of its proper divisors (218931011).

1230109309 is a wasteful number, since it uses less digits than its factorization.

1230109309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23100.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 1230109309 is about 35072.9141788931. The cubic root of 1230109309 is about 1071.4730080931.

The spelling of 1230109309 in words is "one billion, two hundred thirty million, one hundred nine thousand, three hundred nine".