39489397 has 8 divisors (see below), whose sum is σ = 40713656. Its totient is φ = 38273472.

The previous prime is 39489377. The next prime is 39489403. The reversal of 39489397 is 79398493.

It can be written as a sum of positive squares in 4 ways, for example, as 19766916 + 19722481 = 4446^2 + 4441^2 .

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-39489397 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 (39489347) 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, 8323 + ... + 12175.

It is an arithmetic number, because the mean of its divisors is an integer number (5089207).

Almost surely, 2^39489397 is an apocalyptic number.

39489397 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

39489397 is a deficient number, since it is larger than the sum of its proper divisors (1224259).

39489397 is a wasteful number, since it uses less digits than its factorization.

39489397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167.

The product of its digits is 1469664, while the sum is 52.

The square root of 39489397 is about 6284.0589589850. The cubic root of 39489397 is about 340.5337550622.

The spelling of 39489397 in words is "thirty-nine million, four hundred eighty-nine thousand, three hundred ninety-seven".