42969889 has 4 divisors (see below), whose sum is σ = 42983424. Its totient is φ = 42956356.

The previous prime is 42969881. The next prime is 42969893. The reversal of 42969889 is 98896924.

42969889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42969889 - 2³ = 42969881 is a prime.

It is a super-2 number, since 2×42969889² = 3692822721344642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42969881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864 + ... + 9310.

It is an arithmetic number, because the mean of its divisors is an integer number (10745856).

Almost surely, 2^42969889 is an apocalyptic number.

It is an amenable number.

42969889 is a deficient number, since it is larger than the sum of its proper divisors (13535).

42969889 is an equidigital number, since it uses as much as digits as its factorization.

42969889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534.

The product of its digits is 2239488, while the sum is 55.

The square root of 42969889 is about 6555.1421799988. The cubic root of 42969889 is about 350.2580111146.

The spelling of 42969889 in words is "forty-two million, nine hundred sixty-nine thousand, eight hundred eighty-nine".