629675509 has 4 divisors (see below), whose sum is σ = 646693804. Its totient is φ = 612657216.

The previous prime is 629675507. The next prime is 629675537. The reversal of 629675509 is 905576926.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905576926 = 2 ⋅452788463.

It can be written as a sum of positive squares in 2 ways, for example, as 401000625 + 228674884 = 20025^2 + 15122^2 .

It is a cyclic number.

It is not a de Polignac number, because 629675509 - 2¹ = 629675507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629675507) 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, 8509092 + ... + 8509165.

It is an arithmetic number, because the mean of its divisors is an integer number (161673451).

Almost surely, 2^629675509 is an apocalyptic number.

It is an amenable number.

629675509 is a deficient number, since it is larger than the sum of its proper divisors (17018295).

629675509 is a wasteful number, since it uses less digits than its factorization.

629675509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17018294.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The square root of 629675509 is about 25093.3359480162. The cubic root of 629675509 is about 857.1146810672.

The spelling of 629675509 in words is "six hundred twenty-nine million, six hundred seventy-five thousand, five hundred nine".