42729679 has 4 divisors (see below), whose sum is σ = 42759976. Its totient is φ = 42699384.

The previous prime is 42729641. The next prime is 42729683. The reversal of 42729679 is 97692724.

It is a happy number.

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 42729679 - 2¹¹ = 42727631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42729079) 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, 12924 + ... + 15889.

It is an arithmetic number, because the mean of its divisors is an integer number (10689994).

Almost surely, 2^42729679 is an apocalyptic number.

42729679 is a deficient number, since it is larger than the sum of its proper divisors (30297).

42729679 is a wasteful number, since it uses less digits than its factorization.

42729679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30296.

The product of its digits is 381024, while the sum is 46.

The square root of 42729679 is about 6536.7942448879. The cubic root of 42729679 is about 349.6041211046.

The spelling of 42729679 in words is "forty-two million, seven hundred twenty-nine thousand, six hundred seventy-nine".