16401773 has 2 divisors, whose sum is σ = 16401774. Its totient is φ = 16401772.

The previous prime is 16401761. The next prime is 16401793. The reversal of 16401773 is 37710461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 64009 = 4042^2 + 253^2 .

It is an emirp because it is prime and its reverse (37710461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16401773 - 2⁴ = 16401757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16401703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200886 + 8200887.

It is an arithmetic number, because the mean of its divisors is an integer number (8200887).

Almost surely, 2^16401773 is an apocalyptic number.

It is an amenable number.

16401773 is a deficient number, since it is larger than the sum of its proper divisors (1).

16401773 is an equidigital number, since it uses as much as digits as its factorization.

16401773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 16401773 is about 4049.9102459190. The cubic root of 16401773 is about 254.0759739252.

The spelling of 16401773 in words is "sixteen million, four hundred one thousand, seven hundred seventy-three".