39691907 has 6 divisors (see below), whose sum is σ = 40357044. Its totient is φ = 39037560.

The previous prime is 39691903. The next prime is 39691913. The reversal of 39691907 is 70919693.

It is a happy number.

39691907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39691907 - 2² = 39691903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39691903) 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 5 ways as a sum of consecutive naturals, for example, 1613 + ... + 9054.

It is an arithmetic number, because the mean of its divisors is an integer number (6726174).

Almost surely, 2^39691907 is an apocalyptic number.

39691907 is a deficient number, since it is larger than the sum of its proper divisors (665137).

39691907 is an equidigital number, since it uses as much as digits as its factorization.

39691907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10789 (or 10728 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 39691907 is about 6300.1513473884. The cubic root of 39691907 is about 341.1148725910.

The spelling of 39691907 in words is "thirty-nine million, six hundred ninety-one thousand, nine hundred seven".