342296821 has 2 divisors, whose sum is σ = 342296822. Its totient is φ = 342296820.

The previous prime is 342296789. The next prime is 342296849. The reversal of 342296821 is 128692243.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336722500 + 5574321 = 18350^2 + 2361^2 .

It is an emirp because it is prime and its reverse (128692243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 342296821 - 2⁵ = 342296789 is a prime.

It is a super-2 number, since 2×342296821² = 234334227333412082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342296021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171148410 + 171148411.

It is an arithmetic number, because the mean of its divisors is an integer number (171148411).

Almost surely, 2^342296821 is an apocalyptic number.

It is an amenable number.

342296821 is a deficient number, since it is larger than the sum of its proper divisors (1).

342296821 is an equidigital number, since it uses as much as digits as its factorization.

342296821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 342296821 is about 18501.2653891565. The cubic root of 342296821 is about 699.5213196779.

The spelling of 342296821 in words is "three hundred forty-two million, two hundred ninety-six thousand, eight hundred twenty-one".