39013906 has 4 divisors (see below), whose sum is σ = 58520862. Its totient is φ = 19506952.

The previous prime is 39013853. The next prime is 39013907. The reversal of 39013906 is 60931093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 17715681 = 4615^2 + 4209^2 .

It is a super-2 number, since 2×39013906² = 3044169722753672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39013907) 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 as a sum of consecutive naturals, namely, 9753475 + ... + 9753478.

Almost surely, 2^39013906 is an apocalyptic number.

39013906 is a deficient number, since it is larger than the sum of its proper divisors (19506956).

39013906 is a wasteful number, since it uses less digits than its factorization.

39013906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19506955.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 39013906 is about 6246.1112702225. Note that the first 3 decimals coincide. The cubic root of 39013906 is about 339.1614456540.

Adding to 39013906 its reverse (60931093), we get a palindrome (99944999).

The spelling of 39013906 in words is "thirty-nine million, thirteen thousand, nine hundred six".