629979 has 16 divisors (see below), whose sum is σ = 971520. Its totient is φ = 355680.

The previous prime is 629977. The next prime is 629987. The reversal of 629979 is 979926.

It is not a de Polignac number, because 629979 - 2¹ = 629977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 629979.

It is not an unprimeable number, because it can be changed into a prime (629977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637 + ... + 2865.

It is an arithmetic number, because the mean of its divisors is an integer number (60720).

2⁶²⁹⁹⁷⁹ is an apocalyptic number.

629979 is a deficient number, since it is larger than the sum of its proper divisors (341541).

629979 is a wasteful number, since it uses less digits than its factorization.

629979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its digits is 61236, while the sum is 42.

The square root of 629979 is about 793.7121644526. The cubic root of 629979 is about 85.7252362993.

The spelling of 629979 in words is "six hundred twenty-nine thousand, nine hundred seventy-nine".