43977 has 8 divisors (see below), whose sum is σ = 59616. Its totient is φ = 28832.

The previous prime is 43973. The next prime is 43987. The reversal of 43977 is 77934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43977 - 2² = 43973 is a prime.

43977 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (43973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 389.

It is an arithmetic number, because the mean of its divisors is an integer number (7452).

2⁴³⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

43977 is a deficient number, since it is larger than the sum of its proper divisors (15639).

43977 is a wasteful number, since it uses less digits than its factorization.

43977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247.

The product of its digits is 5292, while the sum is 30.

The square root of 43977 is about 209.7069383688. The cubic root of 43977 is about 35.2973309166.

The spelling of 43977 in words is "forty-three thousand, nine hundred seventy-seven".