42769639 has 4 divisors (see below), whose sum is σ = 46657800. Its totient is φ = 38881480.

The previous prime is 42769633. The next prime is 42769667. The reversal of 42769639 is 93696724.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42769639 - 2⁷ = 42769511 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 (42769633) 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, 1944064 + ... + 1944085.

It is an arithmetic number, because the mean of its divisors is an integer number (11664450).

Almost surely, 2^42769639 is an apocalyptic number.

42769639 is a deficient number, since it is larger than the sum of its proper divisors (3888161).

42769639 is a wasteful number, since it uses less digits than its factorization.

42769639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888160.

The product of its digits is 489888, while the sum is 46.

The square root of 42769639 is about 6539.8500747341. The cubic root of 42769639 is about 349.7130682375.

The spelling of 42769639 in words is "forty-two million, seven hundred sixty-nine thousand, six hundred thirty-nine".