106171978 has 16 divisors (see below), whose sum is σ = 174360096. Its totient is φ = 48086640.

The previous prime is 106171973. The next prime is 106172047. The reversal of 106171978 is 879171601.

It is a super-2 number, since 2×106171978² = 22544977824864968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 106171978.

It is not an unprimeable number, because it can be changed into a prime (106171973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 14752.

It is an arithmetic number, because the mean of its divisors is an integer number (10897506).

Almost surely, 2^106171978 is an apocalyptic number.

106171978 is a deficient number, since it is larger than the sum of its proper divisors (68188118).

106171978 is a wasteful number, since it uses less digits than its factorization.

106171978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 106171978 is about 10303.9787460961. The cubic root of 106171978 is about 473.5181564588.

The spelling of 106171978 in words is "one hundred six million, one hundred seventy-one thousand, nine hundred seventy-eight".