345178663 has 2 divisors, whose sum is σ = 345178664. Its totient is φ = 345178662.

The previous prime is 345178649. The next prime is 345178667. The reversal of 345178663 is 366871543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345178663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345178667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172589331 + 172589332.

It is an arithmetic number, because the mean of its divisors is an integer number (172589332).

Almost surely, 2^345178663 is an apocalyptic number.

345178663 is a deficient number, since it is larger than the sum of its proper divisors (1).

345178663 is an equidigital number, since it uses as much as digits as its factorization.

345178663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 345178663 is about 18578.9844447968. The cubic root of 345178663 is about 701.4789567399.

The spelling of 345178663 in words is "three hundred forty-five million, one hundred seventy-eight thousand, six hundred sixty-three".