42739663 has 8 divisors (see below), whose sum is σ = 43337360. Its totient is φ = 42145920.

The previous prime is 42739633. The next prime is 42739693. The reversal of 42739663 is 36693724.

It is an interprime number because it is at equal distance from previous prime (42739633) and next prime (42739693).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42739663 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 (42739633) 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, 25456 + ... + 27082.

It is an arithmetic number, because the mean of its divisors is an integer number (5417170).

Almost surely, 2^42739663 is an apocalyptic number.

42739663 is a deficient number, since it is larger than the sum of its proper divisors (597697).

42739663 is a wasteful number, since it uses less digits than its factorization.

42739663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977.

The product of its digits is 163296, while the sum is 40.

The square root of 42739663 is about 6537.5578773729. The cubic root of 42739663 is about 349.6313478925.

The spelling of 42739663 in words is "forty-two million, seven hundred thirty-nine thousand, six hundred sixty-three".