42679947 has 12 divisors (see below), whose sum is σ = 60060840. Its totient is φ = 26955072.

The previous prime is 42679933. The next prime is 42679993. The reversal of 42679947 is 74997624.

It is not a de Polignac number, because 42679947 - 2¹⁴ = 42663563 is a prime.

It is a super-3 number, since 3×42679947³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 42679896 and 42679905.

It is not an unprimeable number, because it can be changed into a prime (42679997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18622 + ... + 20787.

It is an arithmetic number, because the mean of its divisors is an integer number (5005070).

Almost surely, 2^42679947 is an apocalyptic number.

42679947 is a deficient number, since it is larger than the sum of its proper divisors (17380893).

42679947 is a wasteful number, since it uses less digits than its factorization.

42679947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39450 (or 39431 counting only the distinct ones).

The product of its digits is 762048, while the sum is 48.

The square root of 42679947 is about 6532.9891320895. The cubic root of 42679947 is about 349.4684366329.

The spelling of 42679947 in words is "forty-two million, six hundred seventy-nine thousand, nine hundred forty-seven".