629380865 has 4 divisors (see below), whose sum is σ = 755257044. Its totient is φ = 503504688.

The previous prime is 629380861. The next prime is 629380889. The reversal of 629380865 is 568083926.

It is a happy number.

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 404170816 + 225210049 = 20104^2 + 15007^2 .

It is a cyclic number.

It is not a de Polignac number, because 629380865 - 2² = 629380861 is a prime.

It is a super-2 number, since 2×629380865² = 792240546456296450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (629380861) 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, 62938082 + ... + 62938091.

It is an arithmetic number, because the mean of its divisors is an integer number (188814261).

Almost surely, 2^629380865 is an apocalyptic number.

It is an amenable number.

629380865 is a deficient number, since it is larger than the sum of its proper divisors (125876179).

629380865 is a wasteful number, since it uses less digits than its factorization.

629380865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125876178.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 629380865 is about 25087.4642999248. The cubic root of 629380865 is about 856.9809703460.

The spelling of 629380865 in words is "six hundred twenty-nine million, three hundred eighty thousand, eight hundred sixty-five".