116399821 has 2 divisors, whose sum is σ = 116399822. Its totient is φ = 116399820.

The previous prime is 116399813. The next prime is 116399863. The reversal of 116399821 is 128993611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67469796 + 48930025 = 8214^2 + 6995^2 .

It is a cyclic number.

It is not a de Polignac number, because 116399821 - 2³ = 116399813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116390821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58199910 + 58199911.

It is an arithmetic number, because the mean of its divisors is an integer number (58199911).

Almost surely, 2^116399821 is an apocalyptic number.

It is an amenable number.

116399821 is a deficient number, since it is larger than the sum of its proper divisors (1).

116399821 is an equidigital number, since it uses as much as digits as its factorization.

116399821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 116399821 is about 10788.8748718298. The cubic root of 116399821 is about 488.2595773113.

The spelling of 116399821 in words is "one hundred sixteen million, three hundred ninety-nine thousand, eight hundred twenty-one".