42807579 has 4 divisors (see below), whose sum is σ = 57076776. Its totient is φ = 28538384.

The previous prime is 42807539. The next prime is 42807587. The reversal of 42807579 is 97570824.

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 42807579 - 2⁹ = 42807067 is a prime.

It is a super-3 number, since 3×42807579³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42807579.

It is not an unprimeable number, because it can be changed into a prime (42807539) 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, 7134594 + ... + 7134599.

It is an arithmetic number, because the mean of its divisors is an integer number (14269194).

Almost surely, 2^42807579 is an apocalyptic number.

42807579 is a deficient number, since it is larger than the sum of its proper divisors (14269197).

42807579 is a wasteful number, since it uses less digits than its factorization.

42807579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14269196.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 42807579 is about 6542.7501098544. The cubic root of 42807579 is about 349.8164452496.

The spelling of 42807579 in words is "forty-two million, eight hundred seven thousand, five hundred seventy-nine".