43143749 has 16 divisors (see below), whose sum is σ = 49097664. Its totient is φ = 37564800.

The previous prime is 43143707. The next prime is 43143769. The reversal of 43143749 is 94734134.

It is not a de Polignac number, because 43143749 - 2⁸ = 43143493 is a prime.

It is a super-2 number, since 2×43143749² = 3722766155550002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43143769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24209 + ... + 25929.

It is an arithmetic number, because the mean of its divisors is an integer number (3068604).

Almost surely, 2^43143749 is an apocalyptic number.

It is an amenable number.

43143749 is a deficient number, since it is larger than the sum of its proper divisors (5953915).

43143749 is a wasteful number, since it uses less digits than its factorization.

43143749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828.

The product of its digits is 36288, while the sum is 35.

The square root of 43143749 is about 6568.3901376212. The cubic root of 43143749 is about 350.7297671382.

The spelling of 43143749 in words is "forty-three million, one hundred forty-three thousand, seven hundred forty-nine".