38209530197 has 4 divisors (see below), whose sum is σ = 38209954956. Its totient is φ = 38209105440.

The previous prime is 38209530173. The next prime is 38209530199. The reversal of 38209530197 is 79103590283.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 23935493521 + 14274036676 = 154711^2 + 119474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38209530197 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 (38209530199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18368 + ... + 277049.

It is an arithmetic number, because the mean of its divisors is an integer number (9552488739).

Almost surely, 2^38209530197 is an apocalyptic number.

It is an amenable number.

38209530197 is a deficient number, since it is larger than the sum of its proper divisors (424759).

38209530197 is a wasteful number, since it uses less digits than its factorization.

38209530197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424758.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 38209530197 in words is "thirty-eight billion, two hundred nine million, five hundred thirty thousand, one hundred ninety-seven".