309414137 has 4 divisors (see below), whose sum is σ = 320083620. Its totient is φ = 298744656.

The previous prime is 309414109. The next prime is 309414151. The reversal of 309414137 is 731414903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131698576 + 177715561 = 11476^2 + 13331^2 .

It is a cyclic number.

It is not a de Polignac number, because 309414137 - 2⁶ = 309414073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309410137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5334698 + ... + 5334755.

It is an arithmetic number, because the mean of its divisors is an integer number (80020905).

Almost surely, 2^309414137 is an apocalyptic number.

It is an amenable number.

309414137 is a deficient number, since it is larger than the sum of its proper divisors (10669483).

309414137 is a wasteful number, since it uses less digits than its factorization.

309414137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10669482.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 309414137 is about 17590.1716023466. The cubic root of 309414137 is about 676.3633256049.

The spelling of 309414137 in words is "three hundred nine million, four hundred fourteen thousand, one hundred thirty-seven".