16439677 has 2 divisors, whose sum is σ = 16439678. Its totient is φ = 16439676.

The previous prime is 16439653. The next prime is 16439743. The reversal of 16439677 is 77693461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16434916 + 4761 = 4054^2 + 69^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16439677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16439077) 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, 8219838 + 8219839.

It is an arithmetic number, because the mean of its divisors is an integer number (8219839).

Almost surely, 2^16439677 is an apocalyptic number.

It is an amenable number.

16439677 is a deficient number, since it is larger than the sum of its proper divisors (1).

16439677 is an equidigital number, since it uses as much as digits as its factorization.

16439677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 16439677 is about 4054.5871553094. The cubic root of 16439677 is about 254.2715439738.

It can be divided in two parts, 164 and 39677, that multiplied together give a triangular number (6507028 = T₃₆₀₇).

The spelling of 16439677 in words is "sixteen million, four hundred thirty-nine thousand, six hundred seventy-seven".