309243741 has 8 divisors (see below), whose sum is σ = 412421664. Its totient is φ = 206114160.

The previous prime is 309243713. The next prime is 309243751. The reversal of 309243741 is 147342903.

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

It is not a de Polignac number, because 309243741 - 2¹⁵ = 309210973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309243751) 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, 7275 + ... + 25911.

It is an arithmetic number, because the mean of its divisors is an integer number (51552708).

Almost surely, 2^309243741 is an apocalyptic number.

It is an amenable number.

309243741 is a deficient number, since it is larger than the sum of its proper divisors (103177923).

309243741 is a wasteful number, since it uses less digits than its factorization.

309243741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24171.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 309243741 is about 17585.3274351091. The cubic root of 309243741 is about 676.2391438540.

The spelling of 309243741 in words is "three hundred nine million, two hundred forty-three thousand, seven hundred forty-one".