345643913 has 4 divisors (see below), whose sum is σ = 345716628. Its totient is φ = 345571200.

The previous prime is 345643891. The next prime is 345643927. The reversal of 345643913 is 319346543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319346543 = 3659 ⋅87277.

It can be written as a sum of positive squares in 2 ways, for example, as 188567824 + 157076089 = 13732^2 + 12533^2 .

It is a cyclic number.

It is not a de Polignac number, because 345643913 - 2⁶ = 345643849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345643943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28688 + ... + 38913.

It is an arithmetic number, because the mean of its divisors is an integer number (86429157).

Almost surely, 2^345643913 is an apocalyptic number.

It is an amenable number.

345643913 is a deficient number, since it is larger than the sum of its proper divisors (72715).

345643913 is an equidigital number, since it uses as much as digits as its factorization.

345643913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72714.

The product of its digits is 116640, while the sum is 38.

The square root of 345643913 is about 18591.5010959309. The cubic root of 345643913 is about 701.7939786880.

The spelling of 345643913 in words is "three hundred forty-five million, six hundred forty-three thousand, nine hundred thirteen".