309136197 has 8 divisors (see below), whose sum is σ = 412592544. Its totient is φ = 205885328.

The previous prime is 309136189. The next prime is 309136229. The reversal of 309136197 is 791631903.

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 309136197 - 2³ = 309136189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309136117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47823 + ... + 53900.

It is an arithmetic number, because the mean of its divisors is an integer number (51574068).

Almost surely, 2^309136197 is an apocalyptic number.

It is an amenable number.

309136197 is a deficient number, since it is larger than the sum of its proper divisors (103456347).

309136197 is a wasteful number, since it uses less digits than its factorization.

309136197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102739.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 309136197 is about 17582.2693927718. The cubic root of 309136197 is about 676.1607441055.

The spelling of 309136197 in words is "three hundred nine million, one hundred thirty-six thousand, one hundred ninety-seven".