302144309 has 2 divisors, whose sum is σ = 302144310. Its totient is φ = 302144308.

The previous prime is 302144291. The next prime is 302144329. The reversal of 302144309 is 903441203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241647025 + 60497284 = 15545^2 + 7778^2 .

It is a cyclic number.

It is not a de Polignac number, because 302144309 - 2²⁰ = 301095733 is a prime.

It is a super-2 number, since 2×302144309² = 182582366922174962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (302144329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151072154 + 151072155.

It is an arithmetic number, because the mean of its divisors is an integer number (151072155).

Almost surely, 2^302144309 is an apocalyptic number.

It is an amenable number.

302144309 is a deficient number, since it is larger than the sum of its proper divisors (1).

302144309 is an equidigital number, since it uses as much as digits as its factorization.

302144309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 302144309 is about 17382.2987260028. The cubic root of 302144309 is about 671.0241328737.

The spelling of 302144309 in words is "three hundred two million, one hundred forty-four thousand, three hundred nine".