820898699 has 2 divisors, whose sum is σ = 820898700. Its totient is φ = 820898698.

The previous prime is 820898653. The next prime is 820898731. The reversal of 820898699 is 996898028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820898699 - 2¹² = 820894603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (820898399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410449349 + 410449350.

It is an arithmetic number, because the mean of its divisors is an integer number (410449350).

Almost surely, 2^820898699 is an apocalyptic number.

820898699 is a deficient number, since it is larger than the sum of its proper divisors (1).

820898699 is an equidigital number, since it uses as much as digits as its factorization.

820898699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The square root of 820898699 is about 28651.3297946186. The cubic root of 820898699 is about 936.3319778866.

The spelling of 820898699 in words is "eight hundred twenty million, eight hundred ninety-eight thousand, six hundred ninety-nine".