42689789 has 4 divisors (see below), whose sum is σ = 44936640. Its totient is φ = 40442940.

The previous prime is 42689761. The next prime is 42689791. The reversal of 42689789 is 98798624.

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 42689789 - 2²⁰ = 41641213 is a prime.

It is a super-3 number, since 3×42689789³ (a number of 24 digits) contains 333 as substring.

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 42689789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42689719) 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, 1123397 + ... + 1123434.

It is an arithmetic number, because the mean of its divisors is an integer number (11234160).

Almost surely, 2^42689789 is an apocalyptic number.

It is an amenable number.

42689789 is a deficient number, since it is larger than the sum of its proper divisors (2246851).

42689789 is a wasteful number, since it uses less digits than its factorization.

42689789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246850.

The product of its digits is 1741824, while the sum is 53.

The square root of 42689789 is about 6533.7423426395. The cubic root of 42689789 is about 349.4952970537.

The spelling of 42689789 in words is "forty-two million, six hundred eighty-nine thousand, seven hundred eighty-nine".