42973289 has 4 divisors (see below), whose sum is σ = 44021460. Its totient is φ = 41925120.

The previous prime is 42973279. The next prime is 42973291. The reversal of 42973289 is 98237924.

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 24552025 + 18421264 = 4955^2 + 4292^2 .

It is a cyclic number.

It is not a de Polignac number, because 42973289 - 2⁸ = 42973033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42973279) 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, 524024 + ... + 524105.

It is an arithmetic number, because the mean of its divisors is an integer number (11005365).

Almost surely, 2^42973289 is an apocalyptic number.

It is an amenable number.

42973289 is a deficient number, since it is larger than the sum of its proper divisors (1048171).

42973289 is a wasteful number, since it uses less digits than its factorization.

42973289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048170.

The product of its digits is 217728, while the sum is 44.

The square root of 42973289 is about 6555.4015132561. The cubic root of 42973289 is about 350.2672489464.

The spelling of 42973289 in words is "forty-two million, nine hundred seventy-three thousand, two hundred eighty-nine".