16061861 has 2 divisors, whose sum is σ = 16061862. Its totient is φ = 16061860.

The previous prime is 16061819. The next prime is 16061863. The reversal of 16061861 is 16816061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 6728836 = 3055^2 + 2594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16061861 is a prime.

Together with 16061863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16061863) 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, 8030930 + 8030931.

It is an arithmetic number, because the mean of its divisors is an integer number (8030931).

Almost surely, 2^16061861 is an apocalyptic number.

It is an amenable number.

16061861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16061861 is an equidigital number, since it uses as much as digits as its factorization.

16061861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 16061861 is about 4007.7251652278. The cubic root of 16061861 is about 252.3085422477.

The spelling of 16061861 in words is "sixteen million, sixty-one thousand, eight hundred sixty-one".