72120343 has 4 divisors (see below), whose sum is σ = 72160840. Its totient is φ = 72079848.

The previous prime is 72120337. The next prime is 72120383. The reversal of 72120343 is 34302127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72120343 - 2⁵ = 72120311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72120383) 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, 17448 + ... + 21181.

It is an arithmetic number, because the mean of its divisors is an integer number (18040210).

Almost surely, 2^72120343 is an apocalyptic number.

72120343 is a deficient number, since it is larger than the sum of its proper divisors (40497).

72120343 is a wasteful number, since it uses less digits than its factorization.

72120343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40496.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 72120343 is about 8492.3696928478. The cubic root of 72120343 is about 416.2484166389.

The spelling of 72120343 in words is "seventy-two million, one hundred twenty thousand, three hundred forty-three".