345642797 has 2 divisors, whose sum is σ = 345642798. Its totient is φ = 345642796.

The previous prime is 345642779. The next prime is 345642853. The reversal of 345642797 is 797246543.

Together with previous prime (345642779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345439396 + 203401 = 18586^2 + 451^2 .

It is an emirp because it is prime and its reverse (797246543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345642797 - 2⁸ = 345642541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345642707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172821398 + 172821399.

It is an arithmetic number, because the mean of its divisors is an integer number (172821399).

Almost surely, 2^345642797 is an apocalyptic number.

It is an amenable number.

345642797 is a deficient number, since it is larger than the sum of its proper divisors (1).

345642797 is an equidigital number, since it uses as much as digits as its factorization.

345642797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 47.

The square root of 345642797 is about 18591.4710821925. The cubic root of 345642797 is about 701.7932233799.

The spelling of 345642797 in words is "three hundred forty-five million, six hundred forty-two thousand, seven hundred ninety-seven".