2161850699 has 2 divisors, whose sum is σ = 2161850700. Its totient is φ = 2161850698.

The previous prime is 2161850659. The next prime is 2161850711. The reversal of 2161850699 is 9960581612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161850699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2161850659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080925349 + 1080925350.

It is an arithmetic number, because the mean of its divisors is an integer number (1080925350).

Almost surely, 2^2161850699 is an apocalyptic number.

2161850699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161850699 is an equidigital number, since it uses as much as digits as its factorization.

2161850699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 2161850699 is about 46495.7062426199. The cubic root of 2161850699 is about 1293.0298947519.

The spelling of 2161850699 in words is "two billion, one hundred sixty-one million, eight hundred fifty thousand, six hundred ninety-nine".