345730279 has 2 divisors, whose sum is σ = 345730280. Its totient is φ = 345730278.

The previous prime is 345730237. The next prime is 345730291. The reversal of 345730279 is 972037543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345730279 - 2¹¹ = 345728231 is a prime.

It is equal to p_18586426 and since 345730279 and 18586426 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345700279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172865139 + 172865140.

It is an arithmetic number, because the mean of its divisors is an integer number (172865140).

Almost surely, 2^345730279 is an apocalyptic number.

345730279 is a deficient number, since it is larger than the sum of its proper divisors (1).

345730279 is an equidigital number, since it uses as much as digits as its factorization.

345730279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 345730279 is about 18593.8236788456. The cubic root of 345730279 is about 701.8524262105.

The spelling of 345730279 in words is "three hundred forty-five million, seven hundred thirty thousand, two hundred seventy-nine".