42977 has 4 divisors (see below), whose sum is σ = 46896. Its totient is φ = 39060.

The previous prime is 42967. The next prime is 42979. The reversal of 42977 is 77924.

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 42977 - 2⁴ = 42961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42979) 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, 1943 + ... + 1964.

It is an arithmetic number, because the mean of its divisors is an integer number (11724).

2⁴²⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

42977 is a deficient number, since it is larger than the sum of its proper divisors (3919).

42977 is a wasteful number, since it uses less digits than its factorization.

42977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918.

The product of its digits is 3528, while the sum is 29.

The square root of 42977 is about 207.3089481909. The cubic root of 42977 is about 35.0277331212.

It can be divided in two parts, 429 and 77, that multiplied together give a palindrome (33033).

The spelling of 42977 in words is "forty-two thousand, nine hundred seventy-seven".