116620381 has 2 divisors, whose sum is σ = 116620382. Its totient is φ = 116620380.

The previous prime is 116620369. The next prime is 116620409. The reversal of 116620381 is 183026611.

It is an a-pointer prime, because the next prime (116620409) can be obtained adding 116620381 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83557881 + 33062500 = 9141^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 116620381 - 2⁷ = 116620253 is a prime.

It is a super-2 number, since 2×116620381² = 27200626529170322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116620321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58310190 + 58310191.

It is an arithmetic number, because the mean of its divisors is an integer number (58310191).

Almost surely, 2^116620381 is an apocalyptic number.

It is an amenable number.

116620381 is a deficient number, since it is larger than the sum of its proper divisors (1).

116620381 is an equidigital number, since it uses as much as digits as its factorization.

116620381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 116620381 is about 10799.0916747660. The cubic root of 116620381 is about 488.5677753362.

Adding to 116620381 its reverse (183026611), we get a palindrome (299646992).

The spelling of 116620381 in words is "one hundred sixteen million, six hundred twenty thousand, three hundred eighty-one".