42319843 has 2 divisors, whose sum is σ = 42319844. Its totient is φ = 42319842.

The previous prime is 42319819. The next prime is 42319873. The reversal of 42319843 is 34891324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42319843 - 2⁹ = 42319331 is a prime.

It is a super-2 number, since 2×42319843² = 3581938223089298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42319799 and 42319808.

It is not a weakly prime, because it can be changed into another prime (42319873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21159921 + 21159922.

It is an arithmetic number, because the mean of its divisors is an integer number (21159922).

Almost surely, 2^42319843 is an apocalyptic number.

42319843 is a deficient number, since it is larger than the sum of its proper divisors (1).

42319843 is an equidigital number, since it uses as much as digits as its factorization.

42319843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 42319843 is about 6505.3703199741. The cubic root of 42319843 is about 348.4828013774.

The spelling of 42319843 in words is "forty-two million, three hundred nineteen thousand, eight hundred forty-three".