43987873 has 4 divisors (see below), whose sum is σ = 44218368. Its totient is φ = 43757380.

The previous prime is 43987861. The next prime is 43987897. The reversal of 43987873 is 37878934.

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 43987873 - 2¹³ = 43979681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43987813) 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, 114961 + ... + 115342.

It is an arithmetic number, because the mean of its divisors is an integer number (11054592).

Almost surely, 2^43987873 is an apocalyptic number.

It is an amenable number.

43987873 is a deficient number, since it is larger than the sum of its proper divisors (230495).

43987873 is a wasteful number, since it uses less digits than its factorization.

43987873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230494.

The product of its digits is 1016064, while the sum is 49.

The square root of 43987873 is about 6632.3354106981. The cubic root of 43987873 is about 353.0023968143.

The spelling of 43987873 in words is "forty-three million, nine hundred eighty-seven thousand, eight hundred seventy-three".