42719819 has 8 divisors (see below), whose sum is σ = 43435632. Its totient is φ = 42007680.

The previous prime is 42719797. The next prime is 42719821. The reversal of 42719819 is 91891724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42719819 - 2²⁴ = 25942603 is a prime.

It is a super-2 number, since 2×42719819² = 3649965870785522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42719849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31679 + ... + 32999.

It is an arithmetic number, because the mean of its divisors is an integer number (5429454).

Almost surely, 2^42719819 is an apocalyptic number.

42719819 is a deficient number, since it is larger than the sum of its proper divisors (715813).

42719819 is a wasteful number, since it uses less digits than its factorization.

42719819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837.

The product of its digits is 36288, while the sum is 41.

The square root of 42719819 is about 6536.0400090575. The cubic root of 42719819 is about 349.5772283071.

The spelling of 42719819 in words is "forty-two million, seven hundred nineteen thousand, eight hundred nineteen".