16431073 has 4 divisors (see below), whose sum is σ = 16442800. Its totient is φ = 16419348.

The previous prime is 16431053. The next prime is 16431097. The reversal of 16431073 is 37013461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37013461 = 487 ⋅76003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16431073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16431043) 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, 3423 + ... + 6676.

It is an arithmetic number, because the mean of its divisors is an integer number (4110700).

Almost surely, 2^16431073 is an apocalyptic number.

It is an amenable number.

16431073 is a deficient number, since it is larger than the sum of its proper divisors (11727).

16431073 is a wasteful number, since it uses less digits than its factorization.

16431073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11726.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 16431073 is about 4053.5259959694. The cubic root of 16431073 is about 254.2271770409.

The spelling of 16431073 in words is "sixteen million, four hundred thirty-one thousand, seventy-three".