42087923 has 4 divisors (see below), whose sum is σ = 42102960. Its totient is φ = 42072888.

The previous prime is 42087919. The next prime is 42088003. The reversal of 42087923 is 32978024.

42087923 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.

It is a cyclic number.

It is not a de Polignac number, because 42087923 - 2² = 42087919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42087523) 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, 1940 + ... + 9377.

It is an arithmetic number, because the mean of its divisors is an integer number (10525740).

Almost surely, 2^42087923 is an apocalyptic number.

42087923 is a deficient number, since it is larger than the sum of its proper divisors (15037).

42087923 is a wasteful number, since it uses less digits than its factorization.

42087923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15036.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 42087923 is about 6487.5205587343. The cubic root of 42087923 is about 347.8450531191.

The spelling of 42087923 in words is "forty-two million, eighty-seven thousand, nine hundred twenty-three".