43106989 has 4 divisors (see below), whose sum is σ = 43155424. Its totient is φ = 43058556.

The previous prime is 43106977. The next prime is 43107007. The reversal of 43106989 is 98960134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43106989 - 2⁹ = 43106477 is a prime.

It is a super-2 number, since 2×43106989² = 3716425001292242, 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 (43106909) 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, 22857 + ... + 24670.

It is an arithmetic number, because the mean of its divisors is an integer number (10788856).

Almost surely, 2^43106989 is an apocalyptic number.

It is an amenable number.

43106989 is a deficient number, since it is larger than the sum of its proper divisors (48435).

43106989 is an equidigital number, since it uses as much as digits as its factorization.

43106989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48434.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 43106989 is about 6565.5912909653. The cubic root of 43106989 is about 350.6301274454.

The spelling of 43106989 in words is "forty-three million, one hundred six thousand, nine hundred eighty-nine".