629233921 has 4 divisors (see below), whose sum is σ = 643867312. Its totient is φ = 614600532.

The previous prime is 629233853. The next prime is 629233933. The reversal of 629233921 is 129332926.

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 629233921 - 2¹⁹ = 628709633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629233991) 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, 7316631 + ... + 7316716.

It is an arithmetic number, because the mean of its divisors is an integer number (160966828).

Almost surely, 2^629233921 is an apocalyptic number.

It is an amenable number.

629233921 is a deficient number, since it is larger than the sum of its proper divisors (14633391).

629233921 is a wasteful number, since it uses less digits than its factorization.

629233921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14633390.

The product of its digits is 34992, while the sum is 37.

The square root of 629233921 is about 25084.5354950017. The cubic root of 629233921 is about 856.9142709274.

The spelling of 629233921 in words is "six hundred twenty-nine million, two hundred thirty-three thousand, nine hundred twenty-one".