306142293 has 4 divisors (see below), whose sum is σ = 408189728. Its totient is φ = 204094860.

The previous prime is 306142279. The next prime is 306142297. The reversal of 306142293 is 392241603.

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 not a de Polignac number, because 306142293 - 2⁵ = 306142261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 306142293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306142297) 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, 51023713 + ... + 51023718.

It is an arithmetic number, because the mean of its divisors is an integer number (102047432).

Almost surely, 2^306142293 is an apocalyptic number.

It is an amenable number.

306142293 is a deficient number, since it is larger than the sum of its proper divisors (102047435).

306142293 is a wasteful number, since it uses less digits than its factorization.

306142293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102047434.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 306142293 is about 17496.9223865227. The cubic root of 306142293 is about 673.9708453901.

Adding to 306142293 its reverse (392241603), we get a palindrome (698383896).

It can be divided in two parts, 3061 and 42293, that added together give a palindrome (45354).

The spelling of 306142293 in words is "three hundred six million, one hundred forty-two thousand, two hundred ninety-three".