345515447 has 2 divisors, whose sum is σ = 345515448. Its totient is φ = 345515446.

The previous prime is 345515441. The next prime is 345515459. The reversal of 345515447 is 744515543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345515447 - 2⁴ = 345515431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345515447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345515441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172757723 + 172757724.

It is an arithmetic number, because the mean of its divisors is an integer number (172757724).

Almost surely, 2^345515447 is an apocalyptic number.

345515447 is a deficient number, since it is larger than the sum of its proper divisors (1).

345515447 is an equidigital number, since it uses as much as digits as its factorization.

345515447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168000, while the sum is 38.

The square root of 345515447 is about 18588.0458090677. The cubic root of 345515447 is about 701.7070223014.

The spelling of 345515447 in words is "three hundred forty-five million, five hundred fifteen thousand, four hundred forty-seven".