39663617 has 8 divisors (see below), whose sum is σ = 45371712. Its totient is φ = 33966000.

The previous prime is 39663571. The next prime is 39663641. The reversal of 39663617 is 71636693.

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 39663617 - 2¹⁶ = 39598081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39663917) 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, 8867 + ... + 12567.

It is an arithmetic number, because the mean of its divisors is an integer number (5671464).

Almost surely, 2^39663617 is an apocalyptic number.

It is an amenable number.

39663617 is a deficient number, since it is larger than the sum of its proper divisors (5708095).

39663617 is a wasteful number, since it uses less digits than its factorization.

39663617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239.

The product of its digits is 122472, while the sum is 41.

The square root of 39663617 is about 6297.9057630295. The cubic root of 39663617 is about 341.0338112861.

The spelling of 39663617 in words is "thirty-nine million, six hundred sixty-three thousand, six hundred seventeen".