16435623 has 4 divisors (see below), whose sum is σ = 21914168. Its totient is φ = 10957080.

The previous prime is 16435619. The next prime is 16435633. The reversal of 16435623 is 32653461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32653461 = 3 ⋅10884487.

It is not a de Polignac number, because 16435623 - 2² = 16435619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16435633) 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, 2739268 + ... + 2739273.

It is an arithmetic number, because the mean of its divisors is an integer number (5478542).

Almost surely, 2^16435623 is an apocalyptic number.

16435623 is a deficient number, since it is larger than the sum of its proper divisors (5478545).

16435623 is an equidigital number, since it uses as much as digits as its factorization.

16435623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478544.

The product of its digits is 12960, while the sum is 30.

The square root of 16435623 is about 4054.0871968916. The cubic root of 16435623 is about 254.2506412602.

The spelling of 16435623 in words is "sixteen million, four hundred thirty-five thousand, six hundred twenty-three".