42977273 has 4 divisors (see below), whose sum is σ = 43105140. Its totient is φ = 42849408.

The previous prime is 42977269. The next prime is 42977279. The reversal of 42977273 is 37277924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14961424 + 28015849 = 3868^2 + 5293^2 .

It is a cyclic number.

It is not a de Polignac number, because 42977273 - 2² = 42977269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42977273.

It is not an unprimeable number, because it can be changed into a prime (42977279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63428 + ... + 64101.

It is an arithmetic number, because the mean of its divisors is an integer number (10776285).

Almost surely, 2^42977273 is an apocalyptic number.

It is an amenable number.

42977273 is a deficient number, since it is larger than the sum of its proper divisors (127867).

42977273 is a wasteful number, since it uses less digits than its factorization.

42977273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127866.

The product of its digits is 148176, while the sum is 41.

The square root of 42977273 is about 6555.7053777607. The cubic root of 42977273 is about 350.2780728918.

The spelling of 42977273 in words is "forty-two million, nine hundred seventy-seven thousand, two hundred seventy-three".