39897049 has 4 divisors (see below), whose sum is σ = 39910564. Its totient is φ = 39883536.

The previous prime is 39897043. The next prime is 39897061. The reversal of 39897049 is 94079893.

39897049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94079893 = 241 ⋅390373.

It can be written as a sum of positive squares in 2 ways, for example, as 26625600 + 13271449 = 5160^2 + 3643^2 .

It is a cyclic number.

It is not a de Polignac number, because 39897049 - 2⁹ = 39896537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39896993 and 39897011.

It is not an unprimeable number, because it can be changed into a prime (39897043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (9977641).

Almost surely, 2^39897049 is an apocalyptic number.

It is an amenable number.

39897049 is a deficient number, since it is larger than the sum of its proper divisors (13515).

39897049 is an equidigital number, since it uses as much as digits as its factorization.

39897049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13514.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 39897049 is about 6316.4110854187. The cubic root of 39897049 is about 341.7015310314.

The spelling of 39897049 in words is "thirty-nine million, eight hundred ninety-seven thousand, forty-nine".