6408629 has 4 divisors (see below), whose sum is σ = 6420576. Its totient is φ = 6396684.

The previous prime is 6408593. The next prime is 6408631. The reversal of 6408629 is 9268046.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9268046 = 2 ⋅4634023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6408629 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408029) 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, 5129 + ... + 6254.

It is an arithmetic number, because the mean of its divisors is an integer number (1605144).

Almost surely, 2^6408629 is an apocalyptic number.

It is an amenable number.

6408629 is a deficient number, since it is larger than the sum of its proper divisors (11947).

6408629 is a wasteful number, since it uses less digits than its factorization.

6408629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6408629 is about 2531.5270095340. The cubic root of 6408629 is about 185.7469581006.

The spelling of 6408629 in words is "six million, four hundred eight thousand, six hundred twenty-nine".