629634381 has 4 divisors (see below), whose sum is σ = 839512512. Its totient is φ = 419756252.

The previous prime is 629634373. The next prime is 629634403. The reversal of 629634381 is 183436926.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 629634381 - 2³ = 629634373 is a prime.

It is a super-2 number, since 2×629634381² = 792878907474506322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629634311) 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, 104939061 + ... + 104939066.

It is an arithmetic number, because the mean of its divisors is an integer number (209878128).

Almost surely, 2^629634381 is an apocalyptic number.

It is an amenable number.

629634381 is a deficient number, since it is larger than the sum of its proper divisors (209878131).

629634381 is a wasteful number, since it uses less digits than its factorization.

629634381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209878130.

The product of its digits is 186624, while the sum is 42.

The square root of 629634381 is about 25092.5164341881. The cubic root of 629634381 is about 857.0960195081.

The spelling of 629634381 in words is "six hundred twenty-nine million, six hundred thirty-four thousand, three hundred eighty-one".