6397509427 has 4 divisors (see below), whose sum is σ = 6546288760. Its totient is φ = 6248730096.

The previous prime is 6397509407. The next prime is 6397509467. The reversal of 6397509427 is 7249057936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6397509427 - 2¹¹ = 6397507379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6397509407) 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, 74389602 + ... + 74389687.

It is an arithmetic number, because the mean of its divisors is an integer number (1636572190).

Almost surely, 2^6397509427 is an apocalyptic number.

6397509427 is a deficient number, since it is larger than the sum of its proper divisors (148779333).

6397509427 is a wasteful number, since it uses less digits than its factorization.

6397509427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148779332.

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

The square root of 6397509427 is about 79984.4324040622. The cubic root of 6397509427 is about 1856.3946643678.

It can be divided in two parts, 6397509 and 427, that added together give a palindrome (6397936).

The spelling of 6397509427 in words is "six billion, three hundred ninety-seven million, five hundred nine thousand, four hundred twenty-seven".