629651 has 4 divisors (see below), whose sum is σ = 686904. Its totient is φ = 572400.

The previous prime is 629623. The next prime is 629653. The reversal of 629651 is 156926.

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

It is a cyclic number.

It is not a de Polignac number, because 629651 - 2¹⁴ = 613267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629653) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 28610 + ... + 28631.

It is an arithmetic number, because the mean of its divisors is an integer number (171726).

2⁶²⁹⁶⁵¹ is an apocalyptic number.

629651 is a deficient number, since it is larger than the sum of its proper divisors (57253).

629651 is a wasteful number, since it uses less digits than its factorization.

629651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57252.

The product of its digits is 3240, while the sum is 29.

The square root of 629651 is about 793.5055135284. The cubic root of 629651 is about 85.7103560368.

It can be divided in two parts, 6 and 29651, that multiplied together give a triangular number (177906 = T₅₉₆).

The spelling of 629651 in words is "six hundred twenty-nine thousand, six hundred fifty-one".