43701989 has 4 divisors (see below), whose sum is σ = 43715424. Its totient is φ = 43688556.

The previous prime is 43701953. The next prime is 43701997. The reversal of 43701989 is 98910734.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 43701989 - 2²⁴ = 26924773 is a prime.

It is a super-2 number, since 2×43701989² = 3819727685112242, 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 (43701929) 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, 1574 + ... + 9480.

It is an arithmetic number, because the mean of its divisors is an integer number (10928856).

Almost surely, 2^43701989 is an apocalyptic number.

It is an amenable number.

43701989 is a deficient number, since it is larger than the sum of its proper divisors (13435).

43701989 is an equidigital number, since it uses as much as digits as its factorization.

43701989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13434.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 43701989 is about 6610.7479909614. The cubic root of 43701989 is about 352.2359950025.

The spelling of 43701989 in words is "forty-three million, seven hundred one thousand, nine hundred eighty-nine".