39520797 has 4 divisors (see below), whose sum is σ = 52694400. Its totient is φ = 26347196.

The previous prime is 39520787. The next prime is 39520837. The reversal of 39520797 is 79702593.

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 39520797 - 2⁴ = 39520781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39520727) 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, 6586797 + ... + 6586802.

It is an arithmetic number, because the mean of its divisors is an integer number (13173600).

Almost surely, 2^39520797 is an apocalyptic number.

It is an amenable number.

39520797 is a deficient number, since it is larger than the sum of its proper divisors (13173603).

39520797 is a wasteful number, since it uses less digits than its factorization.

39520797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13173602.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 39520797 is about 6286.5568477506. The cubic root of 39520797 is about 340.6239896387.

The spelling of 39520797 in words is "thirty-nine million, five hundred twenty thousand, seven hundred ninety-seven".