16550791 has 2 divisors, whose sum is σ = 16550792. Its totient is φ = 16550790.

The previous prime is 16550753. The next prime is 16550801. The reversal of 16550791 is 19705561.

It is a strong prime.

It is an emirp because it is prime and its reverse (19705561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16550791 - 2⁹ = 16550279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16550711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8275395 + 8275396.

It is an arithmetic number, because the mean of its divisors is an integer number (8275396).

Almost surely, 2^16550791 is an apocalyptic number.

16550791 is a deficient number, since it is larger than the sum of its proper divisors (1).

16550791 is an equidigital number, since it uses as much as digits as its factorization.

16550791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 16550791 is about 4068.2663383805. The cubic root of 16550791 is about 254.8431227828.

The spelling of 16550791 in words is "sixteen million, five hundred fifty thousand, seven hundred ninety-one".