629871049 has 4 divisors (see below), whose sum is σ = 630148036. Its totient is φ = 629594064.

The previous prime is 629871041. The next prime is 629871089. The reversal of 629871049 is 940178926.

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

It can be written as a sum of positive squares in 2 ways, for example, as 434430649 + 195440400 = 20843^2 + 13980^2 .

It is a cyclic number.

It is not a de Polignac number, because 629871049 - 2³ = 629871041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629871041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135054 + ... + 139639.

It is an arithmetic number, because the mean of its divisors is an integer number (157537009).

Almost surely, 2^629871049 is an apocalyptic number.

It is an amenable number.

629871049 is a deficient number, since it is larger than the sum of its proper divisors (276987).

629871049 is a wasteful number, since it uses less digits than its factorization.

629871049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276986.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 629871049 is about 25097.2318991557. The cubic root of 629871049 is about 857.2033949399.

The spelling of 629871049 in words is "six hundred twenty-nine million, eight hundred seventy-one thousand, forty-nine".