39689897 has 8 divisors (see below), whose sum is σ = 43028160. Its totient is φ = 36392400.

The previous prime is 39689891. The next prime is 39689899. The reversal of 39689897 is 79898693.

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 39689897 - 2²⁰ = 38641321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39689891) 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, 8147 + ... + 12072.

It is an arithmetic number, because the mean of its divisors is an integer number (5378520).

Almost surely, 2^39689897 is an apocalyptic number.

It is an amenable number.

39689897 is a deficient number, since it is larger than the sum of its proper divisors (3338263).

39689897 is a wasteful number, since it uses less digits than its factorization.

39689897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20383.

The product of its digits is 5878656, while the sum is 59.

The square root of 39689897 is about 6299.9918253915. The cubic root of 39689897 is about 341.1091144695.

The spelling of 39689897 in words is "thirty-nine million, six hundred eighty-nine thousand, eight hundred ninety-seven".