1409111309 has 2 divisors, whose sum is σ = 1409111310. Its totient is φ = 1409111308.

The previous prime is 1409111287. The next prime is 1409111357. The reversal of 1409111309 is 9031119041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1407000100 + 2111209 = 37510^2 + 1453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1409111309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1409116309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704555654 + 704555655.

It is an arithmetic number, because the mean of its divisors is an integer number (704555655).

Almost surely, 2^1409111309 is an apocalyptic number.

It is an amenable number.

1409111309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1409111309 is an equidigital number, since it uses as much as digits as its factorization.

1409111309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1409111309 is about 37538.1313999512. The cubic root of 1409111309 is about 1121.1105345944.

The spelling of 1409111309 in words is "one billion, four hundred nine million, one hundred eleven thousand, three hundred nine".