9999214691 has 2 divisors, whose sum is σ = 9999214692. Its totient is φ = 9999214690.

The previous prime is 9999214681. The next prime is 9999214723. The reversal of 9999214691 is 1964129999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999214691 - 2¹⁸ = 9998952547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999214691.

It is not a weakly prime, because it can be changed into another prime (9999214661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999607345 + 4999607346.

It is an arithmetic number, because the mean of its divisors is an integer number (4999607346).

Almost surely, 2^9999214691 is an apocalyptic number.

9999214691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999214691 is an equidigital number, since it uses as much as digits as its factorization.

9999214691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2834352, while the sum is 59.

The square root of 9999214691 is about 99996.0733779082. The cubic root of 9999214691 is about 2154.3782919905.

The spelling of 9999214691 in words is "nine billion, nine hundred ninety-nine million, two hundred fourteen thousand, six hundred ninety-one".