116938821 has 4 divisors (see below), whose sum is σ = 155918432. Its totient is φ = 77959212.

The previous prime is 116938819. The next prime is 116938837. The reversal of 116938821 is 128839611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 116938821 - 2¹ = 116938819 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 116938821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116938321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19489801 + ... + 19489806.

It is an arithmetic number, because the mean of its divisors is an integer number (38979608).

Almost surely, 2^116938821 is an apocalyptic number.

It is an amenable number.

116938821 is a deficient number, since it is larger than the sum of its proper divisors (38979611).

116938821 is an equidigital number, since it uses as much as digits as its factorization.

116938821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38979610.

The product of its digits is 20736, while the sum is 39.

The square root of 116938821 is about 10813.8254563314. The cubic root of 116938821 is about 489.0120605420.

The spelling of 116938821 in words is "one hundred sixteen million, nine hundred thirty-eight thousand, eight hundred twenty-one".