39849813 has 12 divisors (see below), whose sum is σ = 59693088. Its totient is φ = 26566380.

The previous prime is 39849811. The next prime is 39849841. The reversal of 39849813 is 31894893.

It is not a de Polignac number, because 39849813 - 2¹ = 39849811 is a prime.

It is a super-2 number, since 2×39849813² = 3176015192269938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39849811) 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 11 ways as a sum of consecutive naturals, for example, 81753 + ... + 82238.

It is an arithmetic number, because the mean of its divisors is an integer number (4974424).

Almost surely, 2^39849813 is an apocalyptic number.

It is an amenable number.

39849813 is a deficient number, since it is larger than the sum of its proper divisors (19843275).

39849813 is an equidigital number, since it uses as much as digits as its factorization.

39849813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164006 (or 163994 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 39849813 is about 6312.6708293717. The cubic root of 39849813 is about 341.5666255853.

The spelling of 39849813 in words is "thirty-nine million, eight hundred forty-nine thousand, eight hundred thirteen".