6403634 has 4 divisors (see below), whose sum is σ = 9605454. Its totient is φ = 3201816.

The previous prime is 6403601. The next prime is 6403643. The reversal of 6403634 is 4363046.

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., 3330625 + 3073009 = 1825^2 + 1753^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600907 + ... + 1600910.

Almost surely, 2^6403634 is an apocalyptic number.

6403634 is a deficient number, since it is larger than the sum of its proper divisors (3201820).

6403634 is a wasteful number, since it uses less digits than its factorization.

6403634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201819.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 6403634 is about 2530.5402585219. The cubic root of 6403634 is about 185.6986873910.

The spelling of 6403634 in words is "six million, four hundred three thousand, six hundred thirty-four".