16397473 has 4 divisors (see below), whose sum is σ = 16482628. Its totient is φ = 16312320.

The previous prime is 16397467. The next prime is 16397509. The reversal of 16397473 is 37479361.

16397473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37479361 = 661 ⋅56701.

It can be written as a sum of positive squares in 2 ways, for example, as 7800849 + 8596624 = 2793^2 + 2932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16397473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16397273) 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, 42288 + ... + 42673.

It is an arithmetic number, because the mean of its divisors is an integer number (4120657).

Almost surely, 2^16397473 is an apocalyptic number.

It is an amenable number.

16397473 is a deficient number, since it is larger than the sum of its proper divisors (85155).

16397473 is an equidigital number, since it uses as much as digits as its factorization.

16397473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85154.

The product of its digits is 95256, while the sum is 40.

The square root of 16397473 is about 4049.3793351574. The cubic root of 16397473 is about 254.0537685580.

The spelling of 16397473 in words is "sixteen million, three hundred ninety-seven thousand, four hundred seventy-three".