309998141 has 4 divisors (see below), whose sum is σ = 314364384. Its totient is φ = 305631900.

The previous prime is 309998119. The next prime is 309998147. The reversal of 309998141 is 141899903.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-309998141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 309998092 and 309998101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309998147) 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, 2183015 + ... + 2183156.

It is an arithmetic number, because the mean of its divisors is an integer number (78591096).

Almost surely, 2^309998141 is an apocalyptic number.

It is an amenable number.

309998141 is a deficient number, since it is larger than the sum of its proper divisors (4366243).

309998141 is an equidigital number, since it uses as much as digits as its factorization.

309998141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366242.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 309998141 is about 17606.7640695274. The cubic root of 309998141 is about 676.7885923558.

The spelling of 309998141 in words is "three hundred nine million, nine hundred ninety-eight thousand, one hundred forty-one".