39796521 has 4 divisors (see below), whose sum is σ = 53062032. Its totient is φ = 26531012.

The previous prime is 39796513. The next prime is 39796531. The reversal of 39796521 is 12569793.

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 39796521 - 2³ = 39796513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39796511) 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, 6632751 + ... + 6632756.

It is an arithmetic number, because the mean of its divisors is an integer number (13265508).

Almost surely, 2^39796521 is an apocalyptic number.

It is an amenable number.

39796521 is a deficient number, since it is larger than the sum of its proper divisors (13265511).

39796521 is a wasteful number, since it uses less digits than its factorization.

39796521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265510.

The product of its digits is 102060, while the sum is 42.

The square root of 39796521 is about 6308.4483829227. The cubic root of 39796521 is about 341.4142962300.

The spelling of 39796521 in words is "thirty-nine million, seven hundred ninety-six thousand, five hundred twenty-one".