345181817 has 2 divisors, whose sum is σ = 345181818. Its totient is φ = 345181816.

The previous prime is 345181813. The next prime is 345181831. The reversal of 345181817 is 718181543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343879936 + 1301881 = 18544^2 + 1141^2 .

It is a cyclic number.

It is not a de Polignac number, because 345181817 - 2² = 345181813 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345181813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172590908 + 172590909.

It is an arithmetic number, because the mean of its divisors is an integer number (172590909).

Almost surely, 2^345181817 is an apocalyptic number.

It is an amenable number.

345181817 is a deficient number, since it is larger than the sum of its proper divisors (1).

345181817 is an equidigital number, since it uses as much as digits as its factorization.

345181817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 38.

The square root of 345181817 is about 18579.0693254533. The cubic root of 345181817 is about 701.4810932740.

The spelling of 345181817 in words is "three hundred forty-five million, one hundred eighty-one thousand, eight hundred seventeen".