16406977 has 2 divisors, whose sum is σ = 16406978. Its totient is φ = 16406976.

The previous prime is 16406963. The next prime is 16406993. The reversal of 16406977 is 77960461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11895601 + 4511376 = 3449^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 16406977 - 2¹⁵ = 16374209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16406917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8203488 + 8203489.

It is an arithmetic number, because the mean of its divisors is an integer number (8203489).

Almost surely, 2^16406977 is an apocalyptic number.

It is an amenable number.

16406977 is a deficient number, since it is larger than the sum of its proper divisors (1).

16406977 is an equidigital number, since it uses as much as digits as its factorization.

16406977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 16406977 is about 4050.5526783391. The cubic root of 16406977 is about 254.1028423935.

The spelling of 16406977 in words is "sixteen million, four hundred six thousand, nine hundred seventy-seven".