72349543 has 16 divisors (see below), whose sum is σ = 85800960. Its totient is φ = 59716800.

The previous prime is 72349531. The next prime is 72349547. The reversal of 72349543 is 34594327.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72349543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72349547) 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, 21078 + ... + 24268.

It is an arithmetic number, because the mean of its divisors is an integer number (5362560).

Almost surely, 2^72349543 is an apocalyptic number.

72349543 is a deficient number, since it is larger than the sum of its proper divisors (13451417).

72349543 is a wasteful number, since it uses less digits than its factorization.

72349543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318.

The product of its digits is 90720, while the sum is 37.

The square root of 72349543 is about 8505.8534551214. The cubic root of 72349543 is about 416.6888991515.

The spelling of 72349543 in words is "seventy-two million, three hundred forty-nine thousand, five hundred forty-three".