9942658213 has 2 divisors, whose sum is σ = 9942658214. Its totient is φ = 9942658212.

The previous prime is 9942658177. The next prime is 9942658279. The reversal of 9942658213 is 3128562499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7310763009 + 2631895204 = 85503^2 + 51302^2 .

It is an emirp because it is prime and its reverse (3128562499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9942658213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9942658513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971329106 + 4971329107.

It is an arithmetic number, because the mean of its divisors is an integer number (4971329107).

Almost surely, 2^9942658213 is an apocalyptic number.

It is an amenable number.

9942658213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942658213 is an equidigital number, since it uses as much as digits as its factorization.

9942658213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 9942658213 is about 99712.8788722901. The cubic root of 9942658213 is about 2150.3088226302.

The spelling of 9942658213 in words is "nine billion, nine hundred forty-two million, six hundred fifty-eight thousand, two hundred thirteen".