345400493 has 2 divisors, whose sum is σ = 345400494. Its totient is φ = 345400492.

The previous prime is 345400457. The next prime is 345400501. The reversal of 345400493 is 394004543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250493929 + 94906564 = 15827^2 + 9742^2 .

It is an emirp because it is prime and its reverse (394004543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345400493 - 2¹⁰ = 345399469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345400093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172700246 + 172700247.

It is an arithmetic number, because the mean of its divisors is an integer number (172700247).

Almost surely, 2^345400493 is an apocalyptic number.

It is an amenable number.

345400493 is a deficient number, since it is larger than the sum of its proper divisors (1).

345400493 is an equidigital number, since it uses as much as digits as its factorization.

345400493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 345400493 is about 18584.9534032238. The cubic root of 345400493 is about 701.6291936765.

The spelling of 345400493 in words is "three hundred forty-five million, four hundred thousand, four hundred ninety-three".