39668897 has 4 divisors (see below), whose sum is σ = 41036820. Its totient is φ = 38300976.

The previous prime is 39668887. The next prime is 39668899. The reversal of 39668897 is 79886693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11621281 + 28047616 = 3409^2 + 5296^2 .

It is a cyclic number.

It is not a de Polignac number, because 39668897 - 2¹⁴ = 39652513 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (39668899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683918 + ... + 683975.

It is an arithmetic number, because the mean of its divisors is an integer number (10259205).

Almost surely, 2^39668897 is an apocalyptic number.

It is an amenable number.

39668897 is a deficient number, since it is larger than the sum of its proper divisors (1367923).

39668897 is a wasteful number, since it uses less digits than its factorization.

39668897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367922.

The product of its digits is 3919104, while the sum is 56.

The square root of 39668897 is about 6298.3249360445. The cubic root of 39668897 is about 341.0489433623.

The spelling of 39668897 in words is "thirty-nine million, six hundred sixty-eight thousand, eight hundred ninety-seven".