345131191 has 2 divisors, whose sum is σ = 345131192. Its totient is φ = 345131190.

The previous prime is 345131131. The next prime is 345131203. The reversal of 345131191 is 191131543.

It is a strong prime.

It is an emirp because it is prime and its reverse (191131543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345131191 - 2⁷ = 345131063 is a prime.

It is a super-3 number, since 3×345131191³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345131131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172565595 + 172565596.

It is an arithmetic number, because the mean of its divisors is an integer number (172565596).

Almost surely, 2^345131191 is an apocalyptic number.

345131191 is a deficient number, since it is larger than the sum of its proper divisors (1).

345131191 is an equidigital number, since it uses as much as digits as its factorization.

345131191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 345131191 is about 18577.7068283467. The cubic root of 345131191 is about 701.4467974175.

The spelling of 345131191 in words is "three hundred forty-five million, one hundred thirty-one thousand, one hundred ninety-one".