43973389 has 4 divisors (see below), whose sum is σ = 44129056. Its totient is φ = 43817724.

The previous prime is 43973383. The next prime is 43973393. The reversal of 43973389 is 98337934.

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 43973389 - 2³ = 43973381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43973381) 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, 77409 + ... + 77974.

It is an arithmetic number, because the mean of its divisors is an integer number (11032264).

Almost surely, 2^43973389 is an apocalyptic number.

It is an amenable number.

43973389 is a deficient number, since it is larger than the sum of its proper divisors (155667).

43973389 is a wasteful number, since it uses less digits than its factorization.

43973389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155666.

The product of its digits is 489888, while the sum is 46.

The square root of 43973389 is about 6631.2433977347. The cubic root of 43973389 is about 352.9636478922.

The spelling of 43973389 in words is "forty-three million, nine hundred seventy-three thousand, three hundred eighty-nine".