42993819 has 18 divisors (see below), whose sum is σ = 67850796. Its totient is φ = 26017320.

The previous prime is 42993803. The next prime is 42993829. The reversal of 42993819 is 91839924.

It is not a de Polignac number, because 42993819 - 2⁴ = 42993803 is a prime.

It is a super-2 number, since 2×42993819² = 3696936944409522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42993829) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64912 + ... + 65570.

Almost surely, 2^42993819 is an apocalyptic number.

42993819 is a deficient number, since it is larger than the sum of its proper divisors (24856977).

42993819 is an equidigital number, since it uses as much as digits as its factorization.

42993819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335 (or 673 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 42993819 is about 6556.9672105326. The cubic root of 42993819 is about 350.3230187975.

It can be divided in two parts, 4299 and 3819, that added together give a palindrome (8118).

The spelling of 42993819 in words is "forty-two million, nine hundred ninety-three thousand, eight hundred nineteen".