42953819 has 4 divisors (see below), whose sum is σ = 42971544. Its totient is φ = 42936096.

The previous prime is 42953809. The next prime is 42953837. The reversal of 42953819 is 91835924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42953819 - 2⁸ = 42953563 is a prime.

It is a super-2 number, since 2×42953819² = 3690061133369522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42953809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4517 + ... + 10310.

It is an arithmetic number, because the mean of its divisors is an integer number (10742886).

Almost surely, 2^42953819 is an apocalyptic number.

42953819 is a deficient number, since it is larger than the sum of its proper divisors (17725).

42953819 is a wasteful number, since it uses less digits than its factorization.

42953819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17724.

The product of its digits is 77760, while the sum is 41.

The square root of 42953819 is about 6553.9163101157. The cubic root of 42953819 is about 350.2143421781.

The spelling of 42953819 in words is "forty-two million, nine hundred fifty-three thousand, eight hundred nineteen".