345031399 has 2 divisors, whose sum is σ = 345031400. Its totient is φ = 345031398.

The previous prime is 345031381. The next prime is 345031411. The reversal of 345031399 is 993130543.

It is a strong prime.

It is an emirp because it is prime and its reverse (993130543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345031399 - 2¹¹ = 345029351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345031339) 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, 172515699 + 172515700.

It is an arithmetic number, because the mean of its divisors is an integer number (172515700).

Almost surely, 2^345031399 is an apocalyptic number.

345031399 is a deficient number, since it is larger than the sum of its proper divisors (1).

345031399 is an equidigital number, since it uses as much as digits as its factorization.

345031399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 345031399 is about 18575.0208344432. The cubic root of 345031399 is about 701.3791849383.

The spelling of 345031399 in words is "three hundred forty-five million, thirty-one thousand, three hundred ninety-nine".