345352991 has 2 divisors, whose sum is σ = 345352992. Its totient is φ = 345352990.

The previous prime is 345352939. The next prime is 345353053. The reversal of 345352991 is 199253543.

It is a weak prime.

It is an emirp because it is prime and its reverse (199253543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345352991 - 2¹⁰ = 345351967 is a prime.

It is a super-3 number, since 3×345352991³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345352921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172676495 + 172676496.

It is an arithmetic number, because the mean of its divisors is an integer number (172676496).

Almost surely, 2^345352991 is an apocalyptic number.

345352991 is a deficient number, since it is larger than the sum of its proper divisors (1).

345352991 is an equidigital number, since it uses as much as digits as its factorization.

345352991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 41.

The square root of 345352991 is about 18583.6753899760. The cubic root of 345352991 is about 701.5970278104.

The spelling of 345352991 in words is "three hundred forty-five million, three hundred fifty-two thousand, nine hundred ninety-one".