42799723 has 8 divisors (see below), whose sum is σ = 45688320. Its totient is φ = 39974760.

The previous prime is 42799699. The next prime is 42799733. The reversal of 42799723 is 32799724.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42799723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42799723.

It is not an unprimeable number, because it can be changed into a prime (42799733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14515 + ... + 17212.

It is an arithmetic number, because the mean of its divisors is an integer number (5711040).

Almost surely, 2^42799723 is an apocalyptic number.

42799723 is a deficient number, since it is larger than the sum of its proper divisors (2888597).

42799723 is a wasteful number, since it uses less digits than its factorization.

42799723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31817.

The product of its digits is 190512, while the sum is 43.

The square root of 42799723 is about 6542.1497231415. The cubic root of 42799723 is about 349.7950446301.

Subtracting from 42799723 its reverse (32799724), we obtain a palindrome (9999999).

The spelling of 42799723 in words is "forty-two million, seven hundred ninety-nine thousand, seven hundred twenty-three".