72409143 has 16 divisors (see below), whose sum is σ = 100108800. Its totient is φ = 46499040.

The previous prime is 72409097. The next prime is 72409153. The reversal of 72409143 is 34190427.

It is a happy number.

It is not a de Polignac number, because 72409143 - 2²⁰ = 71360567 is a prime.

It is a super-4 number, since 4×72409143⁴ (a number of 33 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72409143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72409153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54238 + ... + 55556.

It is an arithmetic number, because the mean of its divisors is an integer number (6256800).

Almost surely, 2^72409143 is an apocalyptic number.

72409143 is a deficient number, since it is larger than the sum of its proper divisors (27699657).

72409143 is a wasteful number, since it uses less digits than its factorization.

72409143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 72409143 is about 8509.3562036149. The cubic root of 72409143 is about 416.8032875363.

The spelling of 72409143 in words is "seventy-two million, four hundred nine thousand, one hundred forty-three".