299343406421 has 2 divisors, whose sum is σ = 299343406422. Its totient is φ = 299343406420.

The previous prime is 299343406393. The next prime is 299343406433. The reversal of 299343406421 is 124604343992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277055902321 + 22287504100 = 526361^2 + 149290^2 .

It is a cyclic number.

It is not a de Polignac number, because 299343406421 - 2³⁴ = 282163537237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299343466421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149671703210 + 149671703211.

It is an arithmetic number, because the mean of its divisors is an integer number (149671703211).

Almost surely, 2^299343406421 is an apocalyptic number.

It is an amenable number.

299343406421 is a deficient number, since it is larger than the sum of its proper divisors (1).

299343406421 is an equidigital number, since it uses as much as digits as its factorization.

299343406421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 299343406421 in words is "two hundred ninety-nine billion, three hundred forty-three million, four hundred six thousand, four hundred twenty-one".