6404712397 has 4 divisors (see below), whose sum is σ = 6405092316. Its totient is φ = 6404332480.

The previous prime is 6404712389. The next prime is 6404712401. The reversal of 6404712397 is 7932174046.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3005122761 + 3399589636 = 54819^2 + 58306^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404712397 - 2³ = 6404712389 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 (6404712317) 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, 163438 + ... + 198799.

It is an arithmetic number, because the mean of its divisors is an integer number (1601273079).

Almost surely, 2^6404712397 is an apocalyptic number.

It is an amenable number.

6404712397 is a deficient number, since it is larger than the sum of its proper divisors (379919).

6404712397 is a wasteful number, since it uses less digits than its factorization.

6404712397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379918.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 6404712397 is about 80029.4470616910. The cubic root of 6404712397 is about 1857.0911093417.

The spelling of 6404712397 in words is "six billion, four hundred four million, seven hundred twelve thousand, three hundred ninety-seven".