6400303397 has 4 divisors (see below), whose sum is σ = 6487978860. Its totient is φ = 6312627936.

The previous prime is 6400303381. The next prime is 6400303409. The reversal of 6400303397 is 7933030046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7933030046 = 2 ⋅3966515023.

It can be written as a sum of positive squares in 2 ways, for example, as 3814174081 + 2586129316 = 61759^2 + 50854^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400303397 - 2⁴ = 6400303381 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 (6400303097) 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, 43837622 + ... + 43837767.

It is an arithmetic number, because the mean of its divisors is an integer number (1621994715).

Almost surely, 2^6400303397 is an apocalyptic number.

It is an amenable number.

6400303397 is a deficient number, since it is larger than the sum of its proper divisors (87675463).

6400303397 is an equidigital number, since it uses as much as digits as its factorization.

6400303397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87675462.

The product of its (nonzero) digits is 40824, while the sum is 35.

The square root of 6400303397 is about 80001.8962087775. The cubic root of 6400303397 is about 1856.6648714008.

The spelling of 6400303397 in words is "six billion, four hundred million, three hundred three thousand, three hundred ninety-seven".