42989823 has 6 divisors (see below), whose sum is σ = 62096424. Its totient is φ = 28659876.

The previous prime is 42989801. The next prime is 42989827. The reversal of 42989823 is 32898924.

It is not a de Polignac number, because 42989823 - 2¹⁴ = 42973439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42989827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2388315 + ... + 2388332.

It is an arithmetic number, because the mean of its divisors is an integer number (10349404).

Almost surely, 2^42989823 is an apocalyptic number.

42989823 is a deficient number, since it is larger than the sum of its proper divisors (19106601).

42989823 is a wasteful number, since it uses less digits than its factorization.

42989823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776653 (or 4776650 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 42989823 is about 6556.6624894072. The cubic root of 42989823 is about 350.3121650346.

The spelling of 42989823 in words is "forty-two million, nine hundred eighty-nine thousand, eight hundred twenty-three".