39797521 has 8 divisors (see below), whose sum is σ = 42868224. Its totient is φ = 36838560.

The previous prime is 39797503. The next prime is 39797543. The reversal of 39797521 is 12579793.

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 39797521 - 2⁷ = 39797393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39797501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27196 + ... + 28621.

It is an arithmetic number, because the mean of its divisors is an integer number (5358528).

Almost surely, 2^39797521 is an apocalyptic number.

39797521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

39797521 is a deficient number, since it is larger than the sum of its proper divisors (3070703).

39797521 is a wasteful number, since it uses less digits than its factorization.

39797521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55871.

The product of its digits is 119070, while the sum is 43.

The square root of 39797521 is about 6308.5276412171. The cubic root of 39797521 is about 341.4171558723.

The spelling of 39797521 in words is "thirty-nine million, seven hundred ninety-seven thousand, five hundred twenty-one".