16367861 has 4 divisors (see below), whose sum is σ = 16932300. Its totient is φ = 15803424.

The previous prime is 16367851. The next prime is 16367863. The reversal of 16367861 is 16876361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 3587236 = 3575^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 16367861 - 2¹⁰ = 16366837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16367863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282176 + ... + 282233.

It is an arithmetic number, because the mean of its divisors is an integer number (4233075).

Almost surely, 2^16367861 is an apocalyptic number.

It is an amenable number.

16367861 is a deficient number, since it is larger than the sum of its proper divisors (564439).

16367861 is an equidigital number, since it uses as much as digits as its factorization.

16367861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564438.

The product of its digits is 36288, while the sum is 38.

The square root of 16367861 is about 4045.7213201109. The cubic root of 16367861 is about 253.9007455214.

The spelling of 16367861 in words is "sixteen million, three hundred sixty-seven thousand, eight hundred sixty-one".