1505969909 has 2 divisors, whose sum is σ = 1505969910. Its totient is φ = 1505969908.

The previous prime is 1505969903. The next prime is 1505969957. The reversal of 1505969909 is 9099695051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233554884 + 272415025 = 35122^2 + 16505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1505969909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1505969903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752984954 + 752984955.

It is an arithmetic number, because the mean of its divisors is an integer number (752984955).

Almost surely, 2^1505969909 is an apocalyptic number.

It is an amenable number.

1505969909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1505969909 is an equidigital number, since it uses as much as digits as its factorization.

1505969909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 984150, while the sum is 53.

The square root of 1505969909 is about 38806.8281234115. The cubic root of 1505969909 is about 1146.2308633894.

The spelling of 1505969909 in words is "one billion, five hundred five million, nine hundred sixty-nine thousand, nine hundred nine".