629822401 has 4 divisors (see below), whose sum is σ = 678270292. Its totient is φ = 581374512.

The previous prime is 629822387. The next prime is 629822423. The reversal of 629822401 is 104228926.

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 278222400 + 351600001 = 16680^2 + 18751^2 .

It is a cyclic number.

It is not a de Polignac number, because 629822401 - 2¹⁹ = 629298113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629822461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24223926 + ... + 24223951.

It is an arithmetic number, because the mean of its divisors is an integer number (169567573).

Almost surely, 2^629822401 is an apocalyptic number.

It is an amenable number.

629822401 is a deficient number, since it is larger than the sum of its proper divisors (48447891).

629822401 is a wasteful number, since it uses less digits than its factorization.

629822401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48447890.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 629822401 is about 25096.2626898907. The cubic root of 629822401 is about 857.1813257113.

The spelling of 629822401 in words is "six hundred twenty-nine million, eight hundred twenty-two thousand, four hundred one".