629930421 has 12 divisors (see below), whose sum is σ = 910224172. Its totient is φ = 419803776.

The previous prime is 629930419. The next prime is 629930459. The reversal of 629930421 is 124039926.

629930421 is a `hidden beast` number, since 629 + 9 + 3 + 0 + 4 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 574129521 + 55800900 = 23961^2 + 7470^2 .

It is not a de Polignac number, because 629930421 - 2¹ = 629930419 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 (629930401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18075 + ... + 39831.

Almost surely, 2^629930421 is an apocalyptic number.

It is an amenable number.

629930421 is a deficient number, since it is larger than the sum of its proper divisors (280293751).

629930421 is a wasteful number, since it uses less digits than its factorization.

629930421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24980 (or 24977 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 629930421 is about 25098.4147108936. The cubic root of 629930421 is about 857.2303275853.

The spelling of 629930421 in words is "six hundred twenty-nine million, nine hundred thirty thousand, four hundred twenty-one".