629658649 has 9 divisors (see below), whose sum is σ = 658829269. Its totient is φ = 601730140.

The previous prime is 629658647. The next prime is 629658661. The reversal of 629658649 is 946856926.

It is a happy number.

The square root of 629658649 is 25093.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 629658649 - 2¹ = 629658647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 629658649.

It is not an unprimeable number, because it can be changed into a prime (629658647) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 576594 + ... + 577684.

Almost surely, 2^629658649 is an apocalyptic number.

629658649 is the 25093-rd square number.

629658649 is the 12547-th centered octagonal number.

It is an amenable number.

629658649 is a deficient number, since it is larger than the sum of its proper divisors (29170620).

629658649 is an frugal number, since it uses more digits than its factorization.

629658649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228 (or 1114 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The cubic root of 629658649 is about 857.1070310515.

The spelling of 629658649 in words is "six hundred twenty-nine million, six hundred fifty-eight thousand, six hundred forty-nine".