16865423 has 2 divisors, whose sum is σ = 16865424. Its totient is φ = 16865422.

The previous prime is 16865413. The next prime is 16865467. The reversal of 16865423 is 32456861.

It is a weak prime.

It is an emirp because it is prime and its reverse (32456861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16865423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16865413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432711 + 8432712.

It is an arithmetic number, because the mean of its divisors is an integer number (8432712).

Almost surely, 2^16865423 is an apocalyptic number.

16865423 is a deficient number, since it is larger than the sum of its proper divisors (1).

16865423 is an equidigital number, since it uses as much as digits as its factorization.

16865423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 16865423 is about 4106.7533405356. The cubic root of 16865423 is about 256.4478600352.

The spelling of 16865423 in words is "sixteen million, eight hundred sixty-five thousand, four hundred twenty-three".