629897217 has 16 divisors (see below), whose sum is σ = 864095040. Its totient is φ = 407987712.

The previous prime is 629897179. The next prime is 629897231. The reversal of 629897217 is 712798926.

It is not a de Polignac number, because 629897217 - 2¹⁴ = 629880833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 629897217.

It is not an unprimeable number, because it can be changed into a prime (629897417) 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, 6792 + ... + 36137.

It is an arithmetic number, because the mean of its divisors is an integer number (54005940).

Almost surely, 2^629897217 is an apocalyptic number.

629897217 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

629897217 is a deficient number, since it is larger than the sum of its proper divisors (234197823).

629897217 is a wasteful number, since it uses less digits than its factorization.

629897217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43072.

The product of its digits is 762048, while the sum is 51.

The square root of 629897217 is about 25097.7532261356. The cubic root of 629897217 is about 857.2152656171.

The spelling of 629897217 in words is "six hundred twenty-nine million, eight hundred ninety-seven thousand, two hundred seventeen".