16623497 has 4 divisors (see below), whose sum is σ = 18134736. Its totient is φ = 15112260.

The previous prime is 16623493. The next prime is 16623511. The reversal of 16623497 is 79432661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16623497 - 2² = 16623493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16623497.

It is not an unprimeable number, because it can be changed into a prime (16623493) 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, 755603 + ... + 755624.

It is an arithmetic number, because the mean of its divisors is an integer number (4533684).

Almost surely, 2^16623497 is an apocalyptic number.

It is an amenable number.

16623497 is a deficient number, since it is larger than the sum of its proper divisors (1511239).

16623497 is a wasteful number, since it uses less digits than its factorization.

16623497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511238.

The product of its digits is 54432, while the sum is 38.

The square root of 16623497 is about 4077.1922937237. The cubic root of 16623497 is about 255.2157446237.

The spelling of 16623497 in words is "sixteen million, six hundred twenty-three thousand, four hundred ninety-seven".