43939481 has 4 divisors (see below), whose sum is σ = 43972992. Its totient is φ = 43905972.

The previous prime is 43939451. The next prime is 43939517. The reversal of 43939481 is 18493934.

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 an emirpimes, since its reverse is a distinct semiprime: 18493934 = 2 ⋅9246967.

It is a cyclic number.

It is not a de Polignac number, because 43939481 - 2⁶ = 43939417 is a prime.

It is a super-2 number, since 2×43939481² = 3861355981098722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43939411) 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, 14705 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (10993248).

Almost surely, 2^43939481 is an apocalyptic number.

It is an amenable number.

43939481 is a deficient number, since it is larger than the sum of its proper divisors (33511).

43939481 is a wasteful number, since it uses less digits than its factorization.

43939481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33510.

The product of its digits is 93312, while the sum is 41.

The square root of 43939481 is about 6628.6862197573. The cubic root of 43939481 is about 352.8729008198.

The spelling of 43939481 in words is "forty-three million, nine hundred thirty-nine thousand, four hundred eighty-one".