212394690847 has 2 divisors, whose sum is σ = 212394690848. Its totient is φ = 212394690846.

The previous prime is 212394690817. The next prime is 212394690863. The reversal of 212394690847 is 748096493212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212394690847 - 2⁷ = 212394690719 is a prime.

It is a super-2 number, since 2×212394690847² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212394690817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106197345423 + 106197345424.

It is an arithmetic number, because the mean of its divisors is an integer number (106197345424).

Almost surely, 2^212394690847 is an apocalyptic number.

212394690847 is a deficient number, since it is larger than the sum of its proper divisors (1).

212394690847 is an equidigital number, since it uses as much as digits as its factorization.

212394690847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 212394690847 in words is "two hundred twelve billion, three hundred ninety-four million, six hundred ninety thousand, eight hundred forty-seven".