6403391869 has 4 divisors (see below), whose sum is σ = 7318162144. Its totient is φ = 5488621596.

The previous prime is 6403391867. The next prime is 6403391879. The reversal of 6403391869 is 9681933046.

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 not a de Polignac number, because 6403391869 - 2¹ = 6403391867 is a prime.

It is a super-2 number, since 2×6403391869² = 82006854855950626322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403391861) 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, 457385127 + ... + 457385140.

It is an arithmetic number, because the mean of its divisors is an integer number (1829540536).

Almost surely, 2^6403391869 is an apocalyptic number.

It is an amenable number.

6403391869 is a deficient number, since it is larger than the sum of its proper divisors (914770275).

6403391869 is an equidigital number, since it uses as much as digits as its factorization.

6403391869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914770274.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 6403391869 is about 80021.1963732110. The cubic root of 6403391869 is about 1856.9634684622.

The spelling of 6403391869 in words is "six billion, four hundred three million, three hundred ninety-one thousand, eight hundred sixty-nine".