42630689 has 4 divisors (see below), whose sum is σ = 42677124. Its totient is φ = 42584256.

The previous prime is 42630677. The next prime is 42630703. The reversal of 42630689 is 98603624.

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 4376464 + 38254225 = 2092^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 42630689 - 2¹⁶ = 42565153 is a prime.

It is a super-2 number, since 2×42630689² = 3634751289229442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42630629) 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, 21812 + ... + 23685.

It is an arithmetic number, because the mean of its divisors is an integer number (10669281).

Almost surely, 2^42630689 is an apocalyptic number.

It is an amenable number.

42630689 is a deficient number, since it is larger than the sum of its proper divisors (46435).

42630689 is an equidigital number, since it uses as much as digits as its factorization.

42630689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46434.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42630689 is about 6529.2181002016. The cubic root of 42630689 is about 349.3339414416. Note that the first 3 decimals are identical.

The spelling of 42630689 in words is "forty-two million, six hundred thirty thousand, six hundred eighty-nine".