1309328949 has 16 divisors (see below), whose sum is σ = 1798716224. Its totient is φ = 846806400.

The previous prime is 1309328947. The next prime is 1309328957. The reversal of 1309328949 is 9498239031.

It is not a de Polignac number, because 1309328949 - 2¹ = 1309328947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1309328898 and 1309328907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309328947) 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, 35647 + ... + 62364.

It is an arithmetic number, because the mean of its divisors is an integer number (112419764).

Almost surely, 2^1309328949 is an apocalyptic number.

It is an amenable number.

1309328949 is a deficient number, since it is larger than the sum of its proper divisors (489387275).

1309328949 is an equidigital number, since it uses as much as digits as its factorization.

1309328949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98148.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 1309328949 is about 36184.6507375710. The cubic root of 1309328949 is about 1093.9973165291.

The spelling of 1309328949 in words is "one billion, three hundred nine million, three hundred twenty-eight thousand, nine hundred forty-nine".