39697133209 has 4 divisors (see below), whose sum is σ = 39702810420. Its totient is φ = 39691456000.

The previous prime is 39697133183. The next prime is 39697133269. The reversal of 39697133209 is 90233179693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90233179693 = 59 ⋅1529375927.

It can be written as a sum of positive squares in 2 ways, for example, as 30443270400 + 9253862809 = 174480^2 + 96197^2 .

It is a cyclic number.

It is not a de Polignac number, because 39697133209 - 2¹¹ = 39697131161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39697133269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828104 + ... + 2842105.

It is an arithmetic number, because the mean of its divisors is an integer number (9925702605).

Almost surely, 2^39697133209 is an apocalyptic number.

It is an amenable number.

39697133209 is a deficient number, since it is larger than the sum of its proper divisors (5677211).

39697133209 is an equidigital number, since it uses as much as digits as its factorization.

39697133209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677210.

The product of its (nonzero) digits is 1653372, while the sum is 52.

The spelling of 39697133209 in words is "thirty-nine billion, six hundred ninety-seven million, one hundred thirty-three thousand, two hundred nine".