16743493 has 4 divisors (see below), whose sum is σ = 18031468. Its totient is φ = 15455520.

The previous prime is 16743491. The next prime is 16743533. The reversal of 16743493 is 39434761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39434761 = 239 ⋅164999.

It can be written as a sum of positive squares in 2 ways, for example, as 5026564 + 11716929 = 2242^2 + 3423^2 .

It is a cyclic number.

It is not a de Polignac number, because 16743493 - 2¹ = 16743491 is a prime.

It is a super-4 number, since 4×16743493⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16743491) 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, 643968 + ... + 643993.

It is an arithmetic number, because the mean of its divisors is an integer number (4507867).

Almost surely, 2^16743493 is an apocalyptic number.

16743493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16743493 is a deficient number, since it is larger than the sum of its proper divisors (1287975).

16743493 is a wasteful number, since it uses less digits than its factorization.

16743493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287974.

The product of its digits is 54432, while the sum is 37.

The square root of 16743493 is about 4091.8813521411. The cubic root of 16743493 is about 255.8283608998.

It can be divided in two parts, 167 and 43493, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 16743493 in words is "sixteen million, seven hundred forty-three thousand, four hundred ninety-three".