629422991 has 16 divisors (see below), whose sum is σ = 669772800. Its totient is φ = 590243808.

The previous prime is 629422961. The next prime is 629423027. The reversal of 629422991 is 199224926.

629422991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-629422991 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 (629422921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367445 + ... + 369153.

It is an arithmetic number, because the mean of its divisors is an integer number (41860800).

Almost surely, 2^629422991 is an apocalyptic number.

629422991 is a deficient number, since it is larger than the sum of its proper divisors (40349809).

629422991 is a wasteful number, since it uses less digits than its factorization.

629422991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038.

The product of its digits is 139968, while the sum is 44.

The square root of 629422991 is about 25088.3038685360. The cubic root of 629422991 is about 857.0000898633. Note that the first 4 decimals are identical.

The spelling of 629422991 in words is "six hundred twenty-nine million, four hundred twenty-two thousand, nine hundred ninety-one".