309623041 has 24 divisors (see below), whose sum is σ = 388135680. Its totient is φ = 241802496.

The previous prime is 309622991. The next prime is 309623059. The reversal of 309623041 is 140326903.

It is not a de Polignac number, because 309623041 - 2¹³ = 309614849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309623081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91801 + ... + 95113.

It is an arithmetic number, because the mean of its divisors is an integer number (16172320).

Almost surely, 2^309623041 is an apocalyptic number.

It is an amenable number.

309623041 is a deficient number, since it is larger than the sum of its proper divisors (78512639).

309623041 is a wasteful number, since it uses less digits than its factorization.

309623041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 309623041 is about 17596.1086891392. The cubic root of 309623041 is about 676.5155091461.

Adding to 309623041 its reverse (140326903), we get a palindrome (449949944).

The spelling of 309623041 in words is "three hundred nine million, six hundred twenty-three thousand, forty-one".