345276991 has 2 divisors, whose sum is σ = 345276992. Its totient is φ = 345276990.

The previous prime is 345276983. The next prime is 345277043. The reversal of 345276991 is 199672543.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345276991 - 2³ = 345276983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345276901) 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, 172638495 + 172638496.

It is an arithmetic number, because the mean of its divisors is an integer number (172638496).

Almost surely, 2^345276991 is an apocalyptic number.

345276991 is a deficient number, since it is larger than the sum of its proper divisors (1).

345276991 is an equidigital number, since it uses as much as digits as its factorization.

345276991 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 345276991 is about 18581.6304720549. The cubic root of 345276991 is about 701.5455584565.

The spelling of 345276991 in words is "three hundred forty-five million, two hundred seventy-six thousand, nine hundred ninety-one".