39920797 has 8 divisors (see below), whose sum is σ = 45807552. Its totient is φ = 34080000.

The previous prime is 39920789. The next prime is 39920807. The reversal of 39920797 is 79702993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39920797 - 2³ = 39920789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39920717) 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 7 ways as a sum of consecutive naturals, for example, 9604 + ... + 13117.

It is an arithmetic number, because the mean of its divisors is an integer number (5725944).

Almost surely, 2^39920797 is an apocalyptic number.

It is an amenable number.

39920797 is a deficient number, since it is larger than the sum of its proper divisors (5886755).

39920797 is a wasteful number, since it uses less digits than its factorization.

39920797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22979.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 39920797 is about 6318.2906707432. The cubic root of 39920797 is about 341.7693148120.

The spelling of 39920797 in words is "thirty-nine million, nine hundred twenty thousand, seven hundred ninety-seven".