39045649 has 4 divisors (see below), whose sum is σ = 39108160. Its totient is φ = 38983140.

The previous prime is 39045613. The next prime is 39045661. The reversal of 39045649 is 94654093.

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 not a de Polignac number, because 39045649 - 2²⁵ = 5491217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39045679) 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, 30309 + ... + 31570.

It is an arithmetic number, because the mean of its divisors is an integer number (9777040).

Almost surely, 2^39045649 is an apocalyptic number.

It is an amenable number.

39045649 is a deficient number, since it is larger than the sum of its proper divisors (62511).

39045649 is an equidigital number, since it uses as much as digits as its factorization.

39045649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62510.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 39045649 is about 6248.6517745831. The cubic root of 39045649 is about 339.2534050289.

The spelling of 39045649 in words is "thirty-nine million, forty-five thousand, six hundred forty-nine".