212346790637 has 2 divisors, whose sum is σ = 212346790638. Its totient is φ = 212346790636.

The previous prime is 212346790633. The next prime is 212346790717. The reversal of 212346790637 is 736097643212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206133252361 + 6213538276 = 454019^2 + 78826^2 .

It is a cyclic number.

It is not a de Polignac number, because 212346790637 - 2² = 212346790633 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212346790633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106173395318 + 106173395319.

It is an arithmetic number, because the mean of its divisors is an integer number (106173395319).

Almost surely, 2^212346790637 is an apocalyptic number.

It is an amenable number.

212346790637 is a deficient number, since it is larger than the sum of its proper divisors (1).

212346790637 is an equidigital number, since it uses as much as digits as its factorization.

212346790637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The spelling of 212346790637 in words is "two hundred twelve billion, three hundred forty-six million, seven hundred ninety thousand, six hundred thirty-seven".