629223391 has 2 divisors, whose sum is σ = 629223392. Its totient is φ = 629223390.

The previous prime is 629223389. The next prime is 629223403. The reversal of 629223391 is 193322926.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 629223391 - 2¹ = 629223389 is a prime.

Together with 629223389, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 629223391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629223341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314611695 + 314611696.

It is an arithmetic number, because the mean of its divisors is an integer number (314611696).

Almost surely, 2^629223391 is an apocalyptic number.

629223391 is a deficient number, since it is larger than the sum of its proper divisors (1).

629223391 is an equidigital number, since it uses as much as digits as its factorization.

629223391 is an odious number, because the sum of its binary digits is odd.

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

The square root of 629223391 is about 25084.3256038507. The cubic root of 629223391 is about 856.9094908516.

The spelling of 629223391 in words is "six hundred twenty-nine million, two hundred twenty-three thousand, three hundred ninety-one".