106787881 has 4 divisors (see below), whose sum is σ = 108538564. Its totient is φ = 105037200.

The previous prime is 106787867. The next prime is 106787893. The reversal of 106787881 is 188787601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50537881 + 56250000 = 7109^2 + 7500^2 .

It is a cyclic number.

It is not a de Polignac number, because 106787881 - 2⁷ = 106787753 is a prime.

It is a super-2 number, since 2×106787881² = 22807303056940322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106787981) 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, 875250 + ... + 875371.

It is an arithmetic number, because the mean of its divisors is an integer number (27134641).

Almost surely, 2^106787881 is an apocalyptic number.

It is an amenable number.

106787881 is a deficient number, since it is larger than the sum of its proper divisors (1750683).

106787881 is an equidigital number, since it uses as much as digits as its factorization.

106787881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750682.

The product of its (nonzero) digits is 150528, while the sum is 46.

The square root of 106787881 is about 10333.8221873613. The cubic root of 106787881 is about 474.4320169477.

The spelling of 106787881 in words is "one hundred six million, seven hundred eighty-seven thousand, eight hundred eighty-one".