1309423065 has 16 divisors (see below), whose sum is σ = 2096179008. Its totient is φ = 697991616.

The previous prime is 1309423061. The next prime is 1309423067. The reversal of 1309423065 is 5603249031.

It is not a de Polignac number, because 1309423065 - 2² = 1309423061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1309423061) 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, 7839 + ... + 51771.

It is an arithmetic number, because the mean of its divisors is an integer number (131011188).

Almost surely, 2^1309423065 is an apocalyptic number.

1309423065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1309423065 is a deficient number, since it is larger than the sum of its proper divisors (786755943).

1309423065 is a wasteful number, since it uses less digits than its factorization.

1309423065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45928.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 1309423065 is about 36185.9512103800. The cubic root of 1309423065 is about 1094.0235284765.

The spelling of 1309423065 in words is "one billion, three hundred nine million, four hundred twenty-three thousand, sixty-five".