42000799 has 2 divisors, whose sum is σ = 42000800. Its totient is φ = 42000798.

The previous prime is 42000793. The next prime is 42000821. The reversal of 42000799 is 99700024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42000799 - 2¹⁷ = 41869727 is a prime.

It is equal to p_2547661 and since 42000799 and 2547661 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42000799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42000793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000399 + 21000400.

It is an arithmetic number, because the mean of its divisors is an integer number (21000400).

Almost surely, 2^42000799 is an apocalyptic number.

42000799 is a deficient number, since it is larger than the sum of its proper divisors (1).

42000799 is an equidigital number, since it uses as much as digits as its factorization.

42000799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 42000799 is about 6480.8023423030. The cubic root of 42000799 is about 347.6048687170.

The spelling of 42000799 in words is "forty-two million, seven hundred ninety-nine", and thus it is an aban number.