1528669109 has 6 divisors (see below), whose sum is σ = 1680272790. Its totient is φ = 1389699080.

The previous prime is 1528669099. The next prime is 1528669123. The reversal of 1528669109 is 9019668251.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1260037009 + 268632100 = 35497^2 + 16390^2 .

It is not a de Polignac number, because 1528669109 - 2⁸ = 1528668853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528669139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6316694 + ... + 6316935.

It is an arithmetic number, because the mean of its divisors is an integer number (280045465).

Almost surely, 2^1528669109 is an apocalyptic number.

It is an amenable number.

1528669109 is a deficient number, since it is larger than the sum of its proper divisors (151603681).

1528669109 is a wasteful number, since it uses less digits than its factorization.

1528669109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633651 (or 12633640 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 1528669109 is about 39098.1982832969. The cubic root of 1528669109 is about 1151.9611424028.

The spelling of 1528669109 in words is "one billion, five hundred twenty-eight million, six hundred sixty-nine thousand, one hundred nine".