42747439 has 8 divisors (see below), whose sum is σ = 49001888. Its totient is φ = 36529920.

The previous prime is 42747437. The next prime is 42747449. The reversal of 42747439 is 93474724.

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

It is not a de Polignac number, because 42747439 - 2¹ = 42747437 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 (42747437) 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, 6702 + ... + 11419.

It is an arithmetic number, because the mean of its divisors is an integer number (6125236).

Almost surely, 2^42747439 is an apocalyptic number.

42747439 is a deficient number, since it is larger than the sum of its proper divisors (6254449).

42747439 is a wasteful number, since it uses less digits than its factorization.

42747439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18465.

The product of its digits is 169344, while the sum is 40.

The square root of 42747439 is about 6538.1525678130. The cubic root of 42747439 is about 349.6525504345.

The spelling of 42747439 in words is "forty-two million, seven hundred forty-seven thousand, four hundred thirty-nine".