106781887 has 4 divisors (see below), whose sum is σ = 110226496. Its totient is φ = 103337280.

The previous prime is 106781869. The next prime is 106781923. The reversal of 106781887 is 788187601.

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

It is a cyclic number.

It is not a de Polignac number, because 106781887 - 2²³ = 98393279 is a prime.

It is a super-2 number, since 2×106781887² = 22804742782561538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106781837) 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, 1722258 + ... + 1722319.

It is an arithmetic number, because the mean of its divisors is an integer number (27556624).

Almost surely, 2^106781887 is an apocalyptic number.

106781887 is a deficient number, since it is larger than the sum of its proper divisors (3444609).

106781887 is an equidigital number, since it uses as much as digits as its factorization.

106781887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444608.

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

The square root of 106781887 is about 10333.5321647537. The cubic root of 106781887 is about 474.4231401641.

The spelling of 106781887 in words is "one hundred six million, seven hundred eighty-one thousand, eight hundred eighty-seven".