39491707 has 16 divisors (see below), whose sum is σ = 41983200. Its totient is φ = 37094400.

The previous prime is 39491677. The next prime is 39491719. The reversal of 39491707 is 70719493.

It is a cyclic number.

It is not a de Polignac number, because 39491707 - 2²³ = 31103099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39491707.

It is not an unprimeable number, because it can be changed into a prime (39491107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284044 + ... + 284182.

It is an arithmetic number, because the mean of its divisors is an integer number (2623950).

It is a vampire number, since it can be written as 4031 ⋅ 9797 (with its own digits).

Almost surely, 2^39491707 is an apocalyptic number.

39491707 is a deficient number, since it is larger than the sum of its proper divisors (2491493).

39491707 is a wasteful number, since it uses less digits than its factorization.

39491707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 39491707 is about 6284.2427547000. The cubic root of 39491707 is about 340.5403949681.

The spelling of 39491707 in words is "thirty-nine million, four hundred ninety-one thousand, seven hundred seven".