16402861 has 2 divisors, whose sum is σ = 16402862. Its totient is φ = 16402860.

The previous prime is 16402847. The next prime is 16402879. The reversal of 16402861 is 16820461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16402500 + 361 = 4050^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 16402861 - 2⁷ = 16402733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16402831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201430 + 8201431.

It is an arithmetic number, because the mean of its divisors is an integer number (8201431).

Almost surely, 2^16402861 is an apocalyptic number.

It is an amenable number.

16402861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16402861 is an equidigital number, since it uses as much as digits as its factorization.

16402861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 16402861 is about 4050.0445676560. The cubic root of 16402861 is about 254.0815917842.

The spelling of 16402861 in words is "sixteen million, four hundred two thousand, eight hundred sixty-one".