629129885 has 8 divisors (see below), whose sum is σ = 756101976. Its totient is φ = 502539840.

The previous prime is 629129867. The next prime is 629129887. The reversal of 629129885 is 588921926.

It can be written as a sum of positive squares in 4 ways, for example, as 5579044 + 623550841 = 2362^2 + 24971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 629129885 - 2⁶ = 629129821 is a prime.

It is a super-2 number, since 2×629129885² = 791608824400226450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629129887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91874 + ... + 98483.

It is an arithmetic number, because the mean of its divisors is an integer number (94512747).

Almost surely, 2^629129885 is an apocalyptic number.

It is an amenable number.

629129885 is a deficient number, since it is larger than the sum of its proper divisors (126972091).

629129885 is a wasteful number, since it uses less digits than its factorization.

629129885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191023.

The product of its digits is 622080, while the sum is 50.

The square root of 629129885 is about 25082.4617013562. The cubic root of 629129885 is about 856.8670416200.

The spelling of 629129885 in words is "six hundred twenty-nine million, one hundred twenty-nine thousand, eight hundred eighty-five".