342176776421 has 2 divisors, whose sum is σ = 342176776422. Its totient is φ = 342176776420.

The previous prime is 342176776387. The next prime is 342176776439. The reversal of 342176776421 is 124677671243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199357785025 + 142818991396 = 446495^2 + 377914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342176776421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 342176776421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342176770421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171088388210 + 171088388211.

It is an arithmetic number, because the mean of its divisors is an integer number (171088388211).

Almost surely, 2^342176776421 is an apocalyptic number.

It is an amenable number.

342176776421 is a deficient number, since it is larger than the sum of its proper divisors (1).

342176776421 is an equidigital number, since it uses as much as digits as its factorization.

342176776421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 50.

The spelling of 342176776421 in words is "three hundred forty-two billion, one hundred seventy-six million, seven hundred seventy-six thousand, four hundred twenty-one".