39897449 has 4 divisors (see below), whose sum is σ = 40402560. Its totient is φ = 39392340.

The previous prime is 39897443. The next prime is 39897461. The reversal of 39897449 is 94479893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39897449 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 39897449.

It is not an unprimeable number, because it can be changed into a prime (39897443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252437 + ... + 252594.

It is an arithmetic number, because the mean of its divisors is an integer number (10100640).

Almost surely, 2^39897449 is an apocalyptic number.

It is an amenable number.

39897449 is a deficient number, since it is larger than the sum of its proper divisors (505111).

39897449 is an equidigital number, since it uses as much as digits as its factorization.

39897449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505110.

The product of its digits is 1959552, while the sum is 53.

The square root of 39897449 is about 6316.4427488896. The cubic root of 39897449 is about 341.7026729718.

The spelling of 39897449 in words is "thirty-nine million, eight hundred ninety-seven thousand, four hundred forty-nine".