42879957 has 4 divisors (see below), whose sum is σ = 57173280. Its totient is φ = 28586636.

The previous prime is 42879943. The next prime is 42879959. The reversal of 42879957 is 75997824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42879957 - 2⁷ = 42879829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42879959) 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, 7146657 + ... + 7146662.

It is an arithmetic number, because the mean of its divisors is an integer number (14293320).

Almost surely, 2^42879957 is an apocalyptic number.

It is an amenable number.

42879957 is a deficient number, since it is larger than the sum of its proper divisors (14293323).

42879957 is a wasteful number, since it uses less digits than its factorization.

42879957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14293322.

The product of its digits is 1270080, while the sum is 51.

The square root of 42879957 is about 6548.2789341933. The cubic root of 42879957 is about 350.0134879156.

The spelling of 42879957 in words is "forty-two million, eight hundred seventy-nine thousand, nine hundred fifty-seven".