42723959 has 4 divisors (see below), whose sum is σ = 42740880. Its totient is φ = 42707040.

The previous prime is 42723953. The next prime is 42723977. The reversal of 42723959 is 95932724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42723959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42723953) 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, 3827 + ... + 10004.

It is an arithmetic number, because the mean of its divisors is an integer number (10685220).

Almost surely, 2^42723959 is an apocalyptic number.

42723959 is a deficient number, since it is larger than the sum of its proper divisors (16921).

42723959 is a wasteful number, since it uses less digits than its factorization.

42723959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16920.

The product of its digits is 136080, while the sum is 41.

The square root of 42723959 is about 6536.3567069125. The cubic root of 42723959 is about 349.5885205130.

The spelling of 42723959 in words is "forty-two million, seven hundred twenty-three thousand, nine hundred fifty-nine".