105670989 has 12 divisors (see below), whose sum is σ = 160669600. Its totient is φ = 66739464.

The previous prime is 105670979. The next prime is 105671011. The reversal of 105670989 is 989076501.

105670989 is a `hidden beast` number, since 1 + 0 + 567 + 0 + 9 + 89 = 666.

It is not a de Polignac number, because 105670989 - 2¹² = 105666893 is a prime.

It is a super-2 number, since 2×105670989² = 22332715832476242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105670919) 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 11 ways as a sum of consecutive naturals, for example, 308809 + ... + 309150.

Almost surely, 2^105670989 is an apocalyptic number.

105670989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

105670989 is a deficient number, since it is larger than the sum of its proper divisors (54998611).

105670989 is a wasteful number, since it uses less digits than its factorization.

105670989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617984 (or 617981 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 105670989 is about 10279.6395364818. The cubic root of 105670989 is about 472.7721922070.

The spelling of 105670989 in words is "one hundred five million, six hundred seventy thousand, nine hundred eighty-nine".