42023819 has 2 divisors, whose sum is σ = 42023820. Its totient is φ = 42023818.

The previous prime is 42023809. The next prime is 42023827. The reversal of 42023819 is 91832024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42023819 - 2⁴ = 42023803 is a prime.

It is a super-2 number, since 2×42023819² = 3532002726689522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42023791 and 42023800.

It is not a weakly prime, because it can be changed into another prime (42023809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21011909 + 21011910.

It is an arithmetic number, because the mean of its divisors is an integer number (21011910).

Almost surely, 2^42023819 is an apocalyptic number.

42023819 is a deficient number, since it is larger than the sum of its proper divisors (1).

42023819 is an equidigital number, since it uses as much as digits as its factorization.

42023819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 42023819 is about 6482.5781136829. The cubic root of 42023819 is about 347.6683627680.

The spelling of 42023819 in words is "forty-two million, twenty-three thousand, eight hundred nineteen".