342795781 has 2 divisors, whose sum is σ = 342795782. Its totient is φ = 342795780.

The previous prime is 342795743. The next prime is 342795811. The reversal of 342795781 is 187597243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335988900 + 6806881 = 18330^2 + 2609^2 .

It is an emirp because it is prime and its reverse (187597243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 342795781 - 2⁷ = 342795653 is a prime.

It is a super-2 number, since 2×342795781² = 235017894942799922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342795181) 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, 171397890 + 171397891.

It is an arithmetic number, because the mean of its divisors is an integer number (171397891).

Almost surely, 2^342795781 is an apocalyptic number.

It is an amenable number.

342795781 is a deficient number, since it is larger than the sum of its proper divisors (1).

342795781 is an equidigital number, since it uses as much as digits as its factorization.

342795781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 342795781 is about 18514.7449617865. The cubic root of 342795781 is about 699.8610479296.

The spelling of 342795781 in words is "three hundred forty-two million, seven hundred ninety-five thousand, seven hundred eighty-one".