42909647 has 8 divisors (see below), whose sum is σ = 48425040. Its totient is φ = 37663360.

The previous prime is 42909641. The next prime is 42909653. The reversal of 42909647 is 74690924.

It is an interprime number because it is at equal distance from previous prime (42909641) and next prime (42909653).

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

It is a cyclic number.

It is not a de Polignac number, because 42909647 - 2¹⁰ = 42908623 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 (42909641) 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, 66938 + ... + 67575.

It is an arithmetic number, because the mean of its divisors is an integer number (6053130).

Almost surely, 2^42909647 is an apocalyptic number.

42909647 is a deficient number, since it is larger than the sum of its proper divisors (5515393).

42909647 is a wasteful number, since it uses less digits than its factorization.

42909647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134553.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 42909647 is about 6550.5455497997. The cubic root of 42909647 is about 350.0942521674.

The spelling of 42909647 in words is "forty-two million, nine hundred nine thousand, six hundred forty-seven".