16453943 has 24 divisors (see below), whose sum is σ = 20205360. Its totient is φ = 13305600.

The previous prime is 16453939. The next prime is 16453951. The reversal of 16453943 is 34935461.

It is a happy number.

It is not a de Polignac number, because 16453943 - 2² = 16453939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16453973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38873 + ... + 39293.

It is an arithmetic number, because the mean of its divisors is an integer number (841890).

Almost surely, 2^16453943 is an apocalyptic number.

16453943 is a deficient number, since it is larger than the sum of its proper divisors (3751417).

16453943 is a wasteful number, since it uses less digits than its factorization.

16453943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 468 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 16453943 is about 4056.3460158128. The cubic root of 16453943 is about 254.3450731776.

The spelling of 16453943 in words is "sixteen million, four hundred fifty-three thousand, nine hundred forty-three".