106261681 has 2 divisors, whose sum is σ = 106261682. Its totient is φ = 106261680.

The previous prime is 106261667. The next prime is 106261691. The reversal of 106261681 is 186162601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104346225 + 1915456 = 10215^2 + 1384^2 .

It is an emirp because it is prime and its reverse (186162601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106261681 - 2⁷ = 106261553 is a prime.

It is a super-2 number, since 2×106261681² = 22583089697891522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106261691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53130840 + 53130841.

It is an arithmetic number, because the mean of its divisors is an integer number (53130841).

Almost surely, 2^106261681 is an apocalyptic number.

It is an amenable number.

106261681 is a deficient number, since it is larger than the sum of its proper divisors (1).

106261681 is an equidigital number, since it uses as much as digits as its factorization.

106261681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 106261681 is about 10308.3306601991. The cubic root of 106261681 is about 473.6514748829.

The spelling of 106261681 in words is "one hundred six million, two hundred sixty-one thousand, six hundred eighty-one".