106127781 has 4 divisors (see below), whose sum is σ = 141503712. Its totient is φ = 70751852.

The previous prime is 106127779. The next prime is 106127807. The reversal of 106127781 is 187721601.

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 a cyclic number.

It is not a de Polignac number, because 106127781 - 2¹ = 106127779 is a prime.

It is a super-2 number, since 2×106127781² = 22526211799967922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106127381) 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, 17687961 + ... + 17687966.

It is an arithmetic number, because the mean of its divisors is an integer number (35375928).

Almost surely, 2^106127781 is an apocalyptic number.

It is an amenable number.

106127781 is a deficient number, since it is larger than the sum of its proper divisors (35375931).

106127781 is an equidigital number, since it uses as much as digits as its factorization.

106127781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35375930.

The product of its (nonzero) digits is 4704, while the sum is 33.

The square root of 106127781 is about 10301.8338658707. The cubic root of 106127781 is about 473.4524423630.

The spelling of 106127781 in words is "one hundred six million, one hundred twenty-seven thousand, seven hundred eighty-one".