345555349 has 2 divisors, whose sum is σ = 345555350. Its totient is φ = 345555348.

The previous prime is 345555317. The next prime is 345555359. The reversal of 345555349 is 943555543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177023025 + 168532324 = 13305^2 + 12982^2 .

It is a cyclic number.

It is not a de Polignac number, because 345555349 - 2⁵ = 345555317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345555359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172777674 + 172777675.

It is an arithmetic number, because the mean of its divisors is an integer number (172777675).

Almost surely, 2^345555349 is an apocalyptic number.

It is an amenable number.

345555349 is a deficient number, since it is larger than the sum of its proper divisors (1).

345555349 is an equidigital number, since it uses as much as digits as its factorization.

345555349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810000, while the sum is 43.

The square root of 345555349 is about 18589.1191023136. The cubic root of 345555349 is about 701.7340335741.

It can be divided in two parts, 34555534 and 9, that added together give a palindrome (34555543).

The spelling of 345555349 in words is "three hundred forty-five million, five hundred fifty-five thousand, three hundred forty-nine".