42008723 has 8 divisors (see below), whose sum is σ = 43119216. Its totient is φ = 40902400.

The previous prime is 42008693. The next prime is 42008749. The reversal of 42008723 is 32780024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42008723 - 2⁸ = 42008467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42008692 and 42008701.

It is not an unprimeable number, because it can be changed into a prime (42008773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35540 + ... + 36702.

It is an arithmetic number, because the mean of its divisors is an integer number (5389902).

Almost surely, 2^42008723 is an apocalyptic number.

42008723 is a deficient number, since it is larger than the sum of its proper divisors (1110493).

42008723 is a wasteful number, since it uses less digits than its factorization.

42008723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 42008723 is about 6481.4136575287. The cubic root of 42008723 is about 347.6267274105.

Adding to 42008723 its reverse (32780024), we get a palindrome (74788747).

The spelling of 42008723 in words is "forty-two million, eight thousand, seven hundred twenty-three".