16398623 has 2 divisors, whose sum is σ = 16398624. Its totient is φ = 16398622.

The previous prime is 16398619. The next prime is 16398643. The reversal of 16398623 is 32689361.

It is a weak prime.

It is an emirp because it is prime and its reverse (32689361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16398623 - 2² = 16398619 is a prime.

It is a super-2 number, since 2×16398623² = 537829672592258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16398643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8199311 + 8199312.

It is an arithmetic number, because the mean of its divisors is an integer number (8199312).

Almost surely, 2^16398623 is an apocalyptic number.

16398623 is a deficient number, since it is larger than the sum of its proper divisors (1).

16398623 is an equidigital number, since it uses as much as digits as its factorization.

16398623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 16398623 is about 4049.5213297376. The cubic root of 16398623 is about 254.0597075829.

The spelling of 16398623 in words is "sixteen million, three hundred ninety-eight thousand, six hundred twenty-three".