1309742795 has 4 divisors (see below), whose sum is σ = 1571691360. Its totient is φ = 1047794232.

The previous prime is 1309742783. The next prime is 1309742803. The reversal of 1309742795 is 5972479031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5972479031 = 421 ⋅14186411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1309742795 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130974275 + ... + 130974284.

It is an arithmetic number, because the mean of its divisors is an integer number (392922840).

Almost surely, 2^1309742795 is an apocalyptic number.

1309742795 is a deficient number, since it is larger than the sum of its proper divisors (261948565).

1309742795 is an equidigital number, since it uses as much as digits as its factorization.

1309742795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261948564.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 1309742795 is about 36190.3688154735. The cubic root of 1309742795 is about 1094.1125660803.

The spelling of 1309742795 in words is "one billion, three hundred nine million, seven hundred forty-two thousand, seven hundred ninety-five".