16629491 has 2 divisors, whose sum is σ = 16629492. Its totient is φ = 16629490.

The previous prime is 16629469. The next prime is 16629497. The reversal of 16629491 is 19492661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16629491 - 2¹⁰ = 16628467 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16629497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8314745 + 8314746.

It is an arithmetic number, because the mean of its divisors is an integer number (8314746).

Almost surely, 2^16629491 is an apocalyptic number.

16629491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16629491 is an equidigital number, since it uses as much as digits as its factorization.

16629491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 16629491 is about 4077.9272921424. The cubic root of 16629491 is about 255.2464156541.

The spelling of 16629491 in words is "sixteen million, six hundred twenty-nine thousand, four hundred ninety-one".