16780073 has 2 divisors, whose sum is σ = 16780074. Its totient is φ = 16780072.

The previous prime is 16780051. The next prime is 16780079. The reversal of 16780073 is 37008761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 683929 = 4012^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 16780073 - 2¹⁴ = 16763689 is a prime.

It is not a weakly prime, because it can be changed into another prime (16780079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8390036 + 8390037.

It is an arithmetic number, because the mean of its divisors is an integer number (8390037).

Almost surely, 2^16780073 is an apocalyptic number.

It is an amenable number.

16780073 is a deficient number, since it is larger than the sum of its proper divisors (1).

16780073 is an equidigital number, since it uses as much as digits as its factorization.

16780073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 16780073 is about 4096.3487400367. The cubic root of 16780073 is about 256.0145306287.

The spelling of 16780073 in words is "sixteen million, seven hundred eighty thousand, seventy-three".