309989041 has 8 divisors (see below), whose sum is σ = 311938304. Its totient is φ = 308046240.

The previous prime is 309989039. The next prime is 309989059. The reversal of 309989041 is 140989903.

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 309989041 - 2¹ = 309989039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309989081) 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, 122596 + ... + 125098.

It is an arithmetic number, because the mean of its divisors is an integer number (38992288).

Almost surely, 2^309989041 is an apocalyptic number.

It is an amenable number.

309989041 is a deficient number, since it is larger than the sum of its proper divisors (1949263).

309989041 is a wasteful number, since it uses less digits than its factorization.

309989041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 309989041 is about 17606.5056442214. The cubic root of 309989041 is about 676.7819699113.

The spelling of 309989041 in words is "three hundred nine million, nine hundred eighty-nine thousand, forty-one".