6435634 has 4 divisors (see below), whose sum is σ = 9653454. Its totient is φ = 3217816.

The previous prime is 6435629. The next prime is 6435643. The reversal of 6435634 is 4365346.

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

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 9409 = 2535^2 + 97^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6435596 and 6435605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608907 + ... + 1608910.

Almost surely, 2^6435634 is an apocalyptic number.

6435634 is a deficient number, since it is larger than the sum of its proper divisors (3217820).

6435634 is a wasteful number, since it uses less digits than its factorization.

6435634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217819.

The product of its digits is 25920, while the sum is 31.

The square root of 6435634 is about 2536.8551397350. The cubic root of 6435634 is about 186.0074957476.

The spelling of 6435634 in words is "six million, four hundred thirty-five thousand, six hundred thirty-four".