16400093 has 2 divisors, whose sum is σ = 16400094. Its totient is φ = 16400092.

The previous prime is 16400047. The next prime is 16400101. The reversal of 16400093 is 39000461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11142244 + 5257849 = 3338^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 16400093 - 2¹⁴ = 16383709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16400693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200046 + 8200047.

It is an arithmetic number, because the mean of its divisors is an integer number (8200047).

Almost surely, 2^16400093 is an apocalyptic number.

It is an amenable number.

16400093 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400093 is an equidigital number, since it uses as much as digits as its factorization.

16400093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 16400093 is about 4049.7028286036. The cubic root of 16400093 is about 254.0672988018.

The spelling of 16400093 in words is "sixteen million, four hundred thousand, ninety-three".