346521997 has 2 divisors, whose sum is σ = 346521998. Its totient is φ = 346521996.

The previous prime is 346521991. The next prime is 346522013. The reversal of 346521997 is 799125643.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300363561 + 46158436 = 17331^2 + 6794^2 .

It is an emirp because it is prime and its reverse (799125643) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 346521997 - 2⁷ = 346521869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346521991) 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 as a sum of consecutive naturals, namely, 173260998 + 173260999.

It is an arithmetic number, because the mean of its divisors is an integer number (173260999).

Almost surely, 2^346521997 is an apocalyptic number.

It is an amenable number.

346521997 is a deficient number, since it is larger than the sum of its proper divisors (1).

346521997 is an equidigital number, since it uses as much as digits as its factorization.

346521997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 346521997 is about 18615.1013158672. The cubic root of 346521997 is about 702.3877621966.

The spelling of 346521997 in words is "three hundred forty-six million, five hundred twenty-one thousand, nine hundred ninety-seven".