6549207397 has 4 divisors (see below), whose sum is σ = 6549405280. Its totient is φ = 6549009516.

The previous prime is 6549207377. The next prime is 6549207409. The reversal of 6549207397 is 7937029456.

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 a de Polignac number, because none of the positive numbers 2^k-6549207397 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 (6549207317) 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, 35913 + ... + 119950.

It is an arithmetic number, because the mean of its divisors is an integer number (1637351320).

Almost surely, 2^6549207397 is an apocalyptic number.

It is an amenable number.

6549207397 is a deficient number, since it is larger than the sum of its proper divisors (197883).

6549207397 is a wasteful number, since it uses less digits than its factorization.

6549207397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197882.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The square root of 6549207397 is about 80927.1734153615. The cubic root of 6549207397 is about 1870.9531584534.

The spelling of 6549207397 in words is "six billion, five hundred forty-nine million, two hundred seven thousand, three hundred ninety-seven".