629948917 has 4 divisors (see below), whose sum is σ = 678406540. Its totient is φ = 581491296.

The previous prime is 629948903. The next prime is 629948953. The reversal of 629948917 is 719849926.

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 315915076 + 314033841 = 17774^2 + 17721^2 .

It is a cyclic number.

It is not a de Polignac number, because 629948917 - 2²⁷ = 495731189 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 (629978917) 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, 24228792 + ... + 24228817.

It is an arithmetic number, because the mean of its divisors is an integer number (169601635).

Almost surely, 2^629948917 is an apocalyptic number.

It is an amenable number.

629948917 is a deficient number, since it is larger than the sum of its proper divisors (48457623).

629948917 is a wasteful number, since it uses less digits than its factorization.

629948917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48457622.

The product of its digits is 1959552, while the sum is 55.

The square root of 629948917 is about 25098.7831776762. The cubic root of 629948917 is about 857.2387174945.

The spelling of 629948917 in words is "six hundred twenty-nine million, nine hundred forty-eight thousand, nine hundred seventeen".