116381621 has 4 divisors (see below), whose sum is σ = 116604672. Its totient is φ = 116158572.

The previous prime is 116381597. The next prime is 116381627. The reversal of 116381621 is 126183611.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126183611 = 29 ⋅4351159.

It is a cyclic number.

It is not a de Polignac number, because 116381621 - 2⁶ = 116381557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116381627) 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, 110741 + ... + 111786.

It is an arithmetic number, because the mean of its divisors is an integer number (29151168).

Almost surely, 2^116381621 is an apocalyptic number.

It is an amenable number.

116381621 is a deficient number, since it is larger than the sum of its proper divisors (223051).

116381621 is an equidigital number, since it uses as much as digits as its factorization.

116381621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223050.

The product of its digits is 1728, while the sum is 29.

The square root of 116381621 is about 10788.0313774108. The cubic root of 116381621 is about 488.2341282816.

The spelling of 116381621 in words is "one hundred sixteen million, three hundred eighty-one thousand, six hundred twenty-one".