346978799 has 2 divisors, whose sum is σ = 346978800. Its totient is φ = 346978798.

The previous prime is 346978781. The next prime is 346978811. The reversal of 346978799 is 997879643.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 346978799 - 2⁸ = 346978543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346978199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173489399 + 173489400.

It is an arithmetic number, because the mean of its divisors is an integer number (173489400).

Almost surely, 2^346978799 is an apocalyptic number.

346978799 is a deficient number, since it is larger than the sum of its proper divisors (1).

346978799 is an equidigital number, since it uses as much as digits as its factorization.

346978799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 62.

The square root of 346978799 is about 18627.3669368486. The cubic root of 346978799 is about 702.6962671428.

The spelling of 346978799 in words is "three hundred forty-six million, nine hundred seventy-eight thousand, seven hundred ninety-nine".