42889633 has 4 divisors (see below), whose sum is σ = 43036308. Its totient is φ = 42742960.

The previous prime is 42889597. The next prime is 42889663. The reversal of 42889633 is 33698824.

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 17164449 + 25725184 = 4143^2 + 5072^2 .

It is a cyclic number.

It is not a de Polignac number, because 42889633 - 2¹⁷ = 42758561 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 42889633.

It is not an unprimeable number, because it can be changed into a prime (42889663) 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, 72898 + ... + 73483.

It is an arithmetic number, because the mean of its divisors is an integer number (10759077).

Almost surely, 2^42889633 is an apocalyptic number.

It is an amenable number.

42889633 is a deficient number, since it is larger than the sum of its proper divisors (146675).

42889633 is a wasteful number, since it uses less digits than its factorization.

42889633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146674.

The product of its digits is 248832, while the sum is 43.

The square root of 42889633 is about 6549.0177126039. The cubic root of 42889633 is about 350.0398131581.

The spelling of 42889633 in words is "forty-two million, eight hundred eighty-nine thousand, six hundred thirty-three".