16623146 has 4 divisors (see below), whose sum is σ = 24934722. Its totient is φ = 8311572.

The previous prime is 16623143. The next prime is 16623197. The reversal of 16623146 is 64132661.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 261121 = 4045^2 + 511^2 .

It is not an unprimeable number, because it can be changed into a prime (16623143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4155785 + ... + 4155788.

Almost surely, 2^16623146 is an apocalyptic number.

16623146 is a deficient number, since it is larger than the sum of its proper divisors (8311576).

16623146 is an equidigital number, since it uses as much as digits as its factorization.

16623146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8311575.

The product of its digits is 5184, while the sum is 29.

The square root of 16623146 is about 4077.1492491691. The cubic root of 16623146 is about 255.2139483439.

The spelling of 16623146 in words is "sixteen million, six hundred twenty-three thousand, one hundred forty-six".