345449999 has 2 divisors, whose sum is σ = 345450000. Its totient is φ = 345449998.

The previous prime is 345449981. The next prime is 345450011. The reversal of 345449999 is 999944543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345449999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345449959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172724999 + 172725000.

It is an arithmetic number, because the mean of its divisors is an integer number (172725000).

Almost surely, 2^345449999 is an apocalyptic number.

345449999 is a deficient number, since it is larger than the sum of its proper divisors (1).

345449999 is an equidigital number, since it uses as much as digits as its factorization.

345449999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 56.

The square root of 345449999 is about 18586.2852393909. The cubic root of 345449999 is about 701.6627134081.

The spelling of 345449999 in words is "three hundred forty-five million, four hundred forty-nine thousand, nine hundred ninety-nine".