6431617 has 4 divisors (see below), whose sum is σ = 6447316. Its totient is φ = 6415920.

The previous prime is 6431597. The next prime is 6431641. The reversal of 6431617 is 7161346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7161346 = 2 ⋅3580673.

It can be written as a sum of positive squares in 2 ways, for example, as 201601 + 6230016 = 449^2 + 2496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6431617 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6431687) 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, 7218 + ... + 8059.

It is an arithmetic number, because the mean of its divisors is an integer number (1611829).

Almost surely, 2^6431617 is an apocalyptic number.

It is an amenable number.

6431617 is a deficient number, since it is larger than the sum of its proper divisors (15699).

6431617 is a wasteful number, since it uses less digits than its factorization.

6431617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15698.

The product of its digits is 3024, while the sum is 28.

The square root of 6431617 is about 2536.0632878538. The cubic root of 6431617 is about 185.9687869156.

The spelling of 6431617 in words is "six million, four hundred thirty-one thousand, six hundred seventeen".