39660971 has 4 divisors (see below), whose sum is σ = 45326832. Its totient is φ = 33995112.

The previous prime is 39660967. The next prime is 39660977. The reversal of 39660971 is 17906693.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 39660971 - 2² = 39660967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39660977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2832920 + ... + 2832933.

It is an arithmetic number, because the mean of its divisors is an integer number (11331708).

Almost surely, 2^39660971 is an apocalyptic number.

39660971 is a deficient number, since it is larger than the sum of its proper divisors (5665861).

39660971 is an equidigital number, since it uses as much as digits as its factorization.

39660971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5665860.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 39660971 is about 6297.6956896948. The cubic root of 39660971 is about 341.0262275473.

The spelling of 39660971 in words is "thirty-nine million, six hundred sixty thousand, nine hundred seventy-one".