39705797 has 4 divisors (see below), whose sum is σ = 41432160. Its totient is φ = 37979436.

The previous prime is 39705791. The next prime is 39705811. The reversal of 39705797 is 79750793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39705797 - 2⁴ = 39705781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39705791) 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, 863147 + ... + 863192.

It is an arithmetic number, because the mean of its divisors is an integer number (10358040).

Almost surely, 2^39705797 is an apocalyptic number.

It is an amenable number.

39705797 is a deficient number, since it is larger than the sum of its proper divisors (1726363).

39705797 is a wasteful number, since it uses less digits than its factorization.

39705797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726362.

The product of its (nonzero) digits is 416745, while the sum is 47.

The square root of 39705797 is about 6301.2536054344. The cubic root of 39705797 is about 341.1546584765.

The spelling of 39705797 in words is "thirty-nine million, seven hundred five thousand, seven hundred ninety-seven".