106183981 has 4 divisors (see below), whose sum is σ = 107924764. Its totient is φ = 104443200.

The previous prime is 106183949. The next prime is 106183997. The reversal of 106183981 is 189381601.

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 8352100 + 97831881 = 2890^2 + 9891^2 .

It is a cyclic number.

It is not a de Polignac number, because 106183981 - 2⁵ = 106183949 is a prime.

It is a super-2 number, since 2×106183981² = 22550075642016722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 106183981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106183901) 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, 870300 + ... + 870421.

It is an arithmetic number, because the mean of its divisors is an integer number (26981191).

Almost surely, 2^106183981 is an apocalyptic number.

It is an amenable number.

106183981 is a deficient number, since it is larger than the sum of its proper divisors (1740783).

106183981 is an equidigital number, since it uses as much as digits as its factorization.

106183981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740782.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 106183981 is about 10304.5611745479. The cubic root of 106183981 is about 473.5359999123.

The spelling of 106183981 in words is "one hundred six million, one hundred eighty-three thousand, nine hundred eighty-one".