42109799 has 8 divisors (see below), whose sum is σ = 45021600. Its totient is φ = 39246336.

The previous prime is 42109787. The next prime is 42109813. The reversal of 42109799 is 99790124.

It is a happy number.

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

It is not a de Polignac number, because 42109799 - 2¹⁶ = 42044263 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 (42109709) 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, 10274 + ... + 13775.

It is an arithmetic number, because the mean of its divisors is an integer number (5627700).

Almost surely, 2^42109799 is an apocalyptic number.

42109799 is a deficient number, since it is larger than the sum of its proper divisors (2911801).

42109799 is a wasteful number, since it uses less digits than its factorization.

42109799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24169.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 42109799 is about 6489.2063459255. The cubic root of 42109799 is about 347.9053090455.

The spelling of 42109799 in words is "forty-two million, one hundred nine thousand, seven hundred ninety-nine".