6401693 has 4 divisors (see below), whose sum is σ = 6414780. Its totient is φ = 6388608.

The previous prime is 6401687. The next prime is 6401713. The reversal of 6401693 is 3961046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3961046 = 2 ⋅1980523.

It can be written as a sum of positive squares in 2 ways, for example, as 5579044 + 822649 = 2362^2 + 907^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401693 - 2²² = 2207389 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 (6401093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5780 + ... + 6797.

It is an arithmetic number, because the mean of its divisors is an integer number (1603695).

Almost surely, 2^6401693 is an apocalyptic number.

It is an amenable number.

6401693 is a deficient number, since it is larger than the sum of its proper divisors (13087).

6401693 is a wasteful number, since it uses less digits than its factorization.

6401693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13086.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 6401693 is about 2530.1567145139. The cubic root of 6401693 is about 185.6799231718.

The spelling of 6401693 in words is "six million, four hundred one thousand, six hundred ninety-three".