106402381 has 2 divisors, whose sum is σ = 106402382. Its totient is φ = 106402380.

The previous prime is 106402357. The next prime is 106402403. The reversal of 106402381 is 183204601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 10949481 = 9770^2 + 3309^2 .

It is an emirp because it is prime and its reverse (183204601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106402381 - 2⁵ = 106402349 is a prime.

It is a super-2 number, since 2×106402381² = 22642933364938322, which contains 22 as substring.

It is equal to p_6108514 and since 106402381 and 6108514 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106402181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53201190 + 53201191.

It is an arithmetic number, because the mean of its divisors is an integer number (53201191).

Almost surely, 2^106402381 is an apocalyptic number.

It is an amenable number.

106402381 is a deficient number, since it is larger than the sum of its proper divisors (1).

106402381 is an equidigital number, since it uses as much as digits as its factorization.

106402381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 106402381 is about 10315.1529799611. The cubic root of 106402381 is about 473.8604350331.

Adding to 106402381 its reverse (183204601), we get a palindrome (289606982).

The spelling of 106402381 in words is "one hundred six million, four hundred two thousand, three hundred eighty-one".