345663449 has 2 divisors, whose sum is σ = 345663450. Its totient is φ = 345663448.

The previous prime is 345663419. The next prime is 345663491. The reversal of 345663449 is 944366543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276889600 + 68773849 = 16640^2 + 8293^2 .

It is an emirp because it is prime and its reverse (944366543) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345663449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (345663419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172831724 + 172831725.

It is an arithmetic number, because the mean of its divisors is an integer number (172831725).

Almost surely, 2^345663449 is an apocalyptic number.

It is an amenable number.

345663449 is a deficient number, since it is larger than the sum of its proper divisors (1).

345663449 is an equidigital number, since it uses as much as digits as its factorization.

345663449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 44.

The square root of 345663449 is about 18592.0264898693. The cubic root of 345663449 is about 701.8072003769.

The spelling of 345663449 in words is "three hundred forty-five million, six hundred sixty-three thousand, four hundred forty-nine".