1309172807 has 8 divisors (see below), whose sum is σ = 1323209280. Its totient is φ = 1295157600.

The previous prime is 1309172803. The next prime is 1309172833. The reversal of 1309172807 is 7082719031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1309172807 - 2² = 1309172803 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 (1309172801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139169 + ... + 148277.

It is an arithmetic number, because the mean of its divisors is an integer number (165401160).

Almost surely, 2^1309172807 is an apocalyptic number.

1309172807 is a deficient number, since it is larger than the sum of its proper divisors (14036473).

1309172807 is a wasteful number, since it uses less digits than its factorization.

1309172807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10633.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 1309172807 is about 36182.4931009459. The cubic root of 1309172807 is about 1093.9538271473.

The spelling of 1309172807 in words is "one billion, three hundred nine million, one hundred seventy-two thousand, eight hundred seven".