345155905 has 4 divisors (see below), whose sum is σ = 414187092. Its totient is φ = 276124720.

The previous prime is 345155897. The next prime is 345155911. The reversal of 345155905 is 509551543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97061904 + 248094001 = 9852^2 + 15751^2 .

It is not a de Polignac number, because 345155905 - 2³ = 345155897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34515586 + ... + 34515595.

It is an arithmetic number, because the mean of its divisors is an integer number (103546773).

Almost surely, 2^345155905 is an apocalyptic number.

It is an amenable number.

345155905 is a deficient number, since it is larger than the sum of its proper divisors (69031187).

345155905 is an equidigital number, since it uses as much as digits as its factorization.

345155905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69031186.

The product of its (nonzero) digits is 67500, while the sum is 37.

The square root of 345155905 is about 18578.3719685014. The cubic root of 345155905 is about 701.4635399807.

The spelling of 345155905 in words is "three hundred forty-five million, one hundred fifty-five thousand, nine hundred five".