39485657 has 4 divisors (see below), whose sum is σ = 39737316. Its totient is φ = 39234000.

The previous prime is 39485639. The next prime is 39485669. The reversal of 39485657 is 75658493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75658493 = 2663 ⋅28411.

It can be written as a sum of positive squares in 2 ways, for example, as 26925721 + 12559936 = 5189^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 39485657 - 2¹⁴ = 39469273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39485057) 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, 125594 + ... + 125907.

It is an arithmetic number, because the mean of its divisors is an integer number (9934329).

Almost surely, 2^39485657 is an apocalyptic number.

It is an amenable number.

39485657 is a deficient number, since it is larger than the sum of its proper divisors (251659).

39485657 is a wasteful number, since it uses less digits than its factorization.

39485657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251658.

The product of its digits is 907200, while the sum is 47.

The square root of 39485657 is about 6283.7613735724. The cubic root of 39485657 is about 340.5230041894.

The spelling of 39485657 in words is "thirty-nine million, four hundred eighty-five thousand, six hundred fifty-seven".