629959691 has 2 divisors, whose sum is σ = 629959692. Its totient is φ = 629959690.

The previous prime is 629959651. The next prime is 629959703. The reversal of 629959691 is 196959926.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-629959691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (629959601) 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 as a sum of consecutive naturals, namely, 314979845 + 314979846.

It is an arithmetic number, because the mean of its divisors is an integer number (314979846).

Almost surely, 2^629959691 is an apocalyptic number.

629959691 is a deficient number, since it is larger than the sum of its proper divisors (1).

629959691 is an equidigital number, since it uses as much as digits as its factorization.

629959691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2361960, while the sum is 56.

The square root of 629959691 is about 25098.9978086775. The cubic root of 629959691 is about 857.2436045771.

The spelling of 629959691 in words is "six hundred twenty-nine million, nine hundred fifty-nine thousand, six hundred ninety-one".