7617986213 has 2 divisors, whose sum is σ = 7617986214. Its totient is φ = 7617986212.

The previous prime is 7617986209. The next prime is 7617986269. The reversal of 7617986213 is 3126897167.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7416998884 + 200987329 = 86122^2 + 14177^2 .

It is a cyclic number.

It is not a de Polignac number, because 7617986213 - 2² = 7617986209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7617986113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3808993106 + 3808993107.

It is an arithmetic number, because the mean of its divisors is an integer number (3808993107).

Almost surely, 2^7617986213 is an apocalyptic number.

It is an amenable number.

7617986213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7617986213 is an equidigital number, since it uses as much as digits as its factorization.

7617986213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 7617986213 is about 87281.0759156875. The cubic root of 7617986213 is about 1967.6449145538.

The spelling of 7617986213 in words is "seven billion, six hundred seventeen million, nine hundred eighty-six thousand, two hundred thirteen".