116408821 has 4 divisors (see below), whose sum is σ = 116460172. Its totient is φ = 116357472.

The previous prime is 116408777. The next prime is 116408833. The reversal of 116408821 is 128804611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22221796 + 94187025 = 4714^2 + 9705^2 .

It is a cyclic number.

It is not a de Polignac number, because 116408821 - 2⁷ = 116408693 is a prime.

It is a super-2 number, since 2×116408821² = 27102027213220082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116402821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22110 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (29115043).

Almost surely, 2^116408821 is an apocalyptic number.

It is an amenable number.

116408821 is a deficient number, since it is larger than the sum of its proper divisors (51351).

116408821 is an equidigital number, since it uses as much as digits as its factorization.

116408821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51350.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 116408821 is about 10789.2919600871. The cubic root of 116408821 is about 488.2721610160.

The spelling of 116408821 in words is "one hundred sixteen million, four hundred eight thousand, eight hundred twenty-one".