42687939 has 8 divisors (see below), whose sum is σ = 65048320. Its totient is φ = 24393096.

The previous prime is 42687917. The next prime is 42687989. The reversal of 42687939 is 93978624.

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

It is not a de Polignac number, because 42687939 - 2⁷ = 42687811 is a prime.

It is a super-3 number, since 3×42687939³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42687989) 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, 1016359 + ... + 1016400.

It is an arithmetic number, because the mean of its divisors is an integer number (8131040).

Almost surely, 2^42687939 is an apocalyptic number.

42687939 is a deficient number, since it is larger than the sum of its proper divisors (22360381).

42687939 is a wasteful number, since it uses less digits than its factorization.

42687939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032769.

The product of its digits is 653184, while the sum is 48.

The square root of 42687939 is about 6533.6007683359. The cubic root of 42687939 is about 349.4902484175.

The spelling of 42687939 in words is "forty-two million, six hundred eighty-seven thousand, nine hundred thirty-nine".